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| Date | 1/31/2024 | 7/31/2023 | 4/30/2023 | 1/31/2023 | 4/30/2022 | 1/31/2022 | 10/31/2021 | 7/31/2021 | 4/30/2021 | 1/31/2021 | 10/31/2020 | 7/31/2020 | 4/30/2020 | 1/31/2020 | 10/31/2019 | 7/31/2019 | 4/30/2019 | 1/31/2019 | 10/31/2018 | 7/31/2018 | 4/30/2018 | 1/31/2018 | 10/31/2017 | 7/31/2017 | 4/30/2017 | 1/31/2017 | 7/31/2016 | 7/31/2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cash and Cash Equivalents | $7,136,000.00 | $21,500,000.00 | $15,441,000.00 | $9,670,000.00 | -- | -- | $77,387,000.00 | $12,854,000.00 | $4,679,000.00 | $6,086,000.00 | $7,231,000.00 | $6,206,000.00 | $8,430,000.00 | $9,522,000.00 | $10,771,000.00 | $12,024,000.00 | $12,969,000.00 | $14,769,000.00 | $10,086,000.00 | $15,803,000.00 | $10,605,000.00 | $12,008,000.00 | $11,519,000.00 | $11,756,000.00 | $11,729,000.00 | $11,861,000.00 | $2,339,000.00 | $5,652,000.00 |
| Accounts Receivable Net Current | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Inventory | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Prepaid Expenses and Other Current Assets | $487,000.00 | $914,000.00 | $146,000.00 | $512,000.00 | $2,251,000.00 | $903,000.00 | $428,000.00 | $1,075,000.00 | $625,000.00 | $116,000.00 | $460,000.00 | $273,000.00 | $336,000.00 | $326,000.00 | $540,000.00 | $507,000.00 | $840,000.00 | $588,000.00 | $484,000.00 | $421,000.00 | $645,000.00 | $191,000.00 | -- | $147,000.00 | -- | -- | -- | -- |
| Total Current Assets | $75,073,000.00 | $82,941,000.00 | $85,048,000.00 | $89,965,000.00 | $62,512,000.00 | $71,544,000.00 | $78,527,000.00 | $14,764,000.00 | $6,032,000.00 | $6,686,000.00 | $8,240,000.00 | $9,832,000.00 | $9,162,000.00 | $10,291,000.00 | $11,660,000.00 | $13,261,000.00 | $14,641,000.00 | $15,713,000.00 | $34,445,000.00 | $44,512,000.00 | $44,198,000.00 | $12,425,000.00 | -- | $12,167,000.00 | -- | -- | -- | -- |
| Property Plant and Equipement | $2,064,000.00 | $1,695,000.00 | $1,713,000.00 | $1,732,000.00 | $42,183,000.00 | $42,537,000.00 | $42,885,000.00 | $43,238,000.00 | $43,591,000.00 | $43,760,000.00 | $44,141,000.00 | $44,433,000.00 | $47,811,000.00 | $48,250,000.00 | $48,588,000.00 | $48,733,000.00 | $49,181,000.00 | $49,378,000.00 | $49,740,000.00 | $50,113,000.00 | $50,554,000.00 | $50,967,000.00 | -- | $51,160,000.00 | -- | -- | -- | -- |
| Intangible Assets Net | $1,888,000.00 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Goodwill | $3,571,000.00 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Other Assets | $42,000.00 | $9,000.00 | $9,000.00 | $9,000.00 | $1,351,000.00 | $1,410,000.00 | $1,463,000.00 | $1,517,000.00 | $1,482,000.00 | $1,534,000.00 | $1,550,000.00 | $1,580,000.00 | -- | $1,450,000.00 | $1,451,000.00 | $1,412,000.00 | $1,223,000.00 | $1,225,000.00 | $1,139,000.00 | $1,126,000.00 | $920,000.00 | $787,000.00 | -- | $540,000.00 | -- | -- | -- | -- |
| Total Assets | $106,149,000.00 | $98,829,000.00 | $96,355,000.00 | $98,550,000.00 | $112,782,000.00 | $122,568,000.00 | $130,406,000.00 | $154,055,000.00 | $146,208,000.00 | $146,249,000.00 | $134,618,000.00 | $136,347,000.00 | $137,431,000.00 | $139,236,000.00 | $140,400,000.00 | $142,143,000.00 | $143,453,000.00 | $144,166,000.00 | $116,629,000.00 | $116,920,000.00 | $115,084,000.00 | $77,644,000.00 | -- | $86,204,000.00 | -- | -- | -- | -- |
| Accounts Payable | $509,000.00 | $333,000.00 | $616,000.00 | $443,000.00 | $873,000.00 | $1,125,000.00 | $1,145,000.00 | $1,160,000.00 | $753,000.00 | $495,000.00 | $1,155,000.00 | $921,000.00 | $700,000.00 | $569,000.00 | $621,000.00 | $795,000.00 | $755,000.00 | $535,000.00 | $298,000.00 | $367,000.00 | $362,000.00 | $89,000.00 | -- | $115,000.00 | -- | -- | -- | -- |
| Accrued Liabilities | $845,000.00 | $763,000.00 | $592,000.00 | $1,326,000.00 | $1,335,000.00 | $6,622,000.00 | $1,292,000.00 | $1,227,000.00 | $861,000.00 | $643,000.00 | $443,000.00 | $1,191,000.00 | $728,000.00 | $579,000.00 | $564,000.00 | $605,000.00 | $203,000.00 | $650,000.00 | $431,000.00 | $500,000.00 | $296,000.00 | $423,000.00 | -- | $213,000.00 | -- | -- | -- | -- |
| Total Current Liabilities | $3,895,000.00 | $2,200,000.00 | $1,463,000.00 | $2,015,000.00 | $17,876,000.00 | $22,912,000.00 | $17,344,000.00 | $17,351,000.00 | $4,951,000.00 | $10,862,000.00 | $5,302,000.00 | $5,819,000.00 | $1,604,000.00 | $1,317,000.00 | $1,438,000.00 | $17,379,000.00 | $16,589,000.00 | $16,334,000.00 | $1,503,000.00 | $1,355,000.00 | $134,000.00 | $25,018,000.00 | -- | $24,126,000.00 | -- | -- | -- | -- |
| Long Term Debt | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Additional Paid-in Capital | $266,159,000.00 | $264,010,000.00 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Accumulated Other Comprehensive Loss | -- | -- | -- | -- | -- | $3,927,000.00 | $3,781,000.00 | $3,772,000.00 | $3,766,000.00 | $3,761,000.00 | $3,724,000.00 | $3,762,000.00 | $3,752,000.00 | $3,756,000.00 | $3,790,000.00 | $3,784,000.00 | $4,134,000.00 | $4,080,000.00 | $4,160,000.00 | $4,043,000.00 | $1,998,000.00 | $2,394,000.00 | -- | $2,316,000.00 | -- | -- | -- | -- |
| Accumulated Deficit | $-164,924,000.00 | $-167,333,000.00 | $-168,552,000.00 | $-167,115,000.00 | $-160,673,000.00 | $-155,144,000.00 | $-170,118,000.00 | $-40,799,000.00 | $-28,419,000.00 | $-25,866,000.00 | $-17,701,000.00 | $-16,255,000.00 | $-10,850,000.00 | $-8,691,000.00 | $-7,438,000.00 | $-5,840,000.00 | $-3,654,000.00 | $-2,649,000.00 | $-1,628,000.00 | $-1,108,000.00 | $-192,000.00 | -- | -- | -- | -- | -- | -- | -- |
| Total Stockholders' Equity | $104,939,000.00 | $100,293,000.00 | $98,528,000.00 | $100,102,000.00 | $98,146,000.00 | $102,877,000.00 | $98,736,000.00 | $122,286,000.00 | $126,771,000.00 | $120,804,000.00 | $115,573,000.00 | $116,800,000.00 | $122,057,000.00 | $124,065,000.00 | $125,151,000.00 | $110,981,000.00 | $118,002,000.00 | $118,827,000.00 | $106,442,000.00 | $106,697,000.00 | $105,441,000.00 | $42,948,000.00 | -- | $52,743,000.00 | -- | -- | -- | -- |
| Controlling Interest in Subsidiaries | $-2,685,000.00 | $-3,664,000.00 | $-3,636,000.00 | $-3,567,000.00 | $-3,240,000.00 | $-3,221,000.00 | $14,326,000.00 | $14,418,000.00 | $14,486,000.00 | $14,583,000.00 | $13,743,000.00 | $13,728,000.00 | $13,770,000.00 | $13,854,000.00 | $13,811,000.00 | $13,783,000.00 | $8,862,000.00 | $9,005,000.00 | $8,684,000.00 | $8,868,000.00 | $9,509,000.00 | $9,678,000.00 | -- | $9,335,000.00 | -- | -- | -- | -- |
| Total Liabilities and Equity | $106,149,000.00 | $98,829,000.00 | $96,355,000.00 | $98,550,000.00 | $112,782,000.00 | $122,568,000.00 | $130,406,000.00 | $154,055,000.00 | $146,208,000.00 | $146,249,000.00 | $134,618,000.00 | $136,347,000.00 | $137,431,000.00 | $139,236,000.00 | $140,400,000.00 | $142,143,000.00 | $143,453,000.00 | $144,166,000.00 | $116,629,000.00 | $116,920,000.00 | $115,084,000.00 | $77,644,000.00 | -- | $86,204,000.00 | -- | -- | -- | -- |
| Date | 1/31/2024 | 7/31/2023 | 4/30/2023 | 1/31/2023 | 4/30/2022 | 1/31/2022 | 10/31/2021 | 7/31/2021 | 4/30/2021 | 1/31/2021 | 10/31/2020 | 7/31/2020 | 4/30/2020 | 1/31/2020 | 10/31/2019 | 7/31/2019 | 4/30/2019 | 1/31/2019 | 10/31/2018 | 7/31/2018 | 4/30/2018 | 1/31/2018 | 10/31/2017 | 7/31/2017 | 4/30/2017 | 1/31/2017 | 7/31/2016 | 7/31/2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Total Revenues | $68,000.00 | $279,000.00 | $211,000.00 | $140,000.00 | $3,011,000.00 | $1,110,000.00 | $1,026,000.00 | $3,971,000.00 | $3,002,000.00 | $2,012,000.00 | $1,053,000.00 | $4,910,000.00 | $3,670,000.00 | $1,236,000.00 | $1,210,000.00 | $4,931,000.00 | $1,377,000.00 | $1,017,000.00 | $1,135,000.00 | $4,371,000.00 | $3,157,000.00 | $956,000.00 | $1,106,000.00 | $5,618,000.00 | $4,018,000.00 | $1,337,000.00 | $5,589,000.00 | -- |
| Cost of Revenues | -- | -- | $249,000.00 | $249,000.00 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Gross Profit | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Research and Development | $612,000.00 | $6,312,000.00 | $5,046,000.00 | $4,306,000.00 | $6,901,000.00 | $3,335,000.00 | $2,153,000.00 | $4,907,000.00 | $3,345,000.00 | $2,083,000.00 | $515,000.00 | $2,391,000.00 | $1,327,000.00 | $448,000.00 | $245,000.00 | $1,027,000.00 | $300,000.00 | $276,000.00 | $373,000.00 | $995,000.00 | -- | -- | -- | -- | -- | -- | -- | -- |
| Selling, General, and Administrative | -- | -- | -- | -- | $15,936,000.00 | $-896,000.00 | $12,892,000.00 | $20,416,000.00 | $8,365,000.00 | $5,359,000.00 | $2,592,000.00 | $9,118,000.00 | $6,343,000.00 | $2,221,000.00 | $2,041,000.00 | $8,821,000.00 | $2,059,000.00 | $1,716,000.00 | $1,453,000.00 | $5,519,000.00 | $4,481,000.00 | $3,079,000.00 | $1,736,000.00 | $3,728,000.00 | $2,667,000.00 | $776,000.00 | $2,754,000.00 | -- |
| Total Operating Expenses | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Loss from Operations | $-3,143,000.00 | $-15,043,000.00 | $-12,432,000.00 | $-9,401,000.00 | $-56,063,000.00 | $-51,206,000.00 | $-49,684,000.00 | $-29,812,000.00 | $-16,787,000.00 | $-13,308,000.00 | $-2,491,000.00 | $-8,465,000.00 | $-5,413,000.00 | $-1,906,000.00 | $-1,542,000.00 | $-6,696,000.00 | $-1,418,000.00 | $-1,406,000.00 | $-1,120,000.00 | $-3,841,000.00 | $-2,600,000.00 | $-816,000.00 | $-1,055,000.00 | $221,000.00 | $-164,000.00 | $127,000.00 | $1,192,000.00 | -- |
| Loss Before Income Taxes | $2,572,000.00 | $-8,745,000.00 | $-10,208,000.00 | $-8,449,000.00 | $-136,943,000.00 | $-2,561,000.00 | $-128,836,000.00 | $-25,131,000.00 | $-12,593,000.00 | $-9,851,000.00 | $-1,522,000.00 | $-6,916,000.00 | $-5,252,000.00 | $-1,316,000.00 | $-1,648,000.00 | $-4,943,000.00 | $-1,154,000.00 | $-1,380,000.00 | $-696,000.00 | $-3,639,000.00 | $-2,269,000.00 | $-1,608,000.00 | $-900,000.00 | $204,000.00 | $293,000.00 | $180,000.00 | $1,159,000.00 | -- |
| Earnings Per Share Basic | $0.10 | $-0.08 | $-0.14 | $-0.08 | $-6.16 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | $-0.75 | $-0.93 | $-0.04 | $-0.07 | $0.01 | $0.01 | $0.02 | $0.01 | $0.06 | -- |
| Weighted Average Shares Basic | 23,642,421 | 23,263,211 | 23,179,364 | 23,085,612 | 19,472,178 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 13,489,583 | 12,566,358 | 12,485 | 12,542,000 | 12,541,998 | 12,541,998 | 12,485 | 12,542,000 | -- | 12,485 | -- |
| Earnings Per Share Diluted | $0.25 | $-0.08 | $-0.14 | $-0.08 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | $-0.75 | $-0.93 | $-0.83 | $-0.07 | $0.01 | $0.01 | $-0.01 | $0.01 | $0.06 | -- |
| Weighted Average Shares Diluted | 24,403,308 | 23,263,211 | 23,179,364 | 23,085,612 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 12,485 | 12,542,000 | -- | -- | 12,485 | 12,542,000 | -- | 12,485 | -- |
| Common Stock Shares Authorized | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Common Stock Shares Outstanding | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Common Stock Value | -- | -- | $8,000.00 | $8,000.00 | $8,000.00 | $8,000.00 | $8,000.00 | $8,000.00 | $8,000.00 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | $40,554,000.00 | -- | $50,427,000.00 | -- | -- | -- | -- |
| Common Stock Par Or Stated Value Per Share | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Payments Of Dividends Common Stock | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Preferred Stock Shares Authorized | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Preferred Stock Shares Outstanding | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Preferred Stock Value | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Preferred Stock Par Or Stated Value Per Share | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Share Price | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |