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Capital Stock, Stock Plans and Stock Based Compensation (Details Narrative) - USD ($) |  |  | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | ---
May 04, 2021 | Jul. 27, 2017 | Jun. 30, 2021 | Mar. 31, 2021 | Jun. 30, 2020 | Mar. 31, 2020 | Jun. 30, 2021 | Jun. 30, 2020 | Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Weighted average term for unrecognized and unvested option to be recognized |  |  |  |  |  |  | 1 year 7 months 6 days |  |
Shares issued |  |  | $ 109,000 | $ 79,000 | $ 56,000 | $ 48,000 |  |  |
Selling, General and Administrative Expense |  |  | 2,997,000 |  | $ 2,700,000 |  | $ 6,202,000 | $ 5,627,000 |
Common Stock [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Stock options, exercise price |  |  |  |  |  |  | $ 3.15 |  |
Issuance of common stock upon exercise of options |  |  |  |  |  |  | 290 |  |
Selling, General and Administrative Expense |  |  |  |  |  |  | $ 221,000 |  |
Number of stock option purchased |  |  |  |  |  |  | 500 |  |
Ferguson Stock Option [Member] | Second Milestone [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Options to purchase shares of common stock |  | 30,000 |  |  |  |  |  |  |
Ferguson Stock Option [Member] | Third Milestone [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Options to purchase shares of common stock |  | 60,000 |  |  |  |  |  |  |
Robert Ferguson [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Issuance of common stock upon exercise of options |  |  |  |  |  |  |  |  | 10,000
Unrecognized compensation cost related to unvested options consultant |  |  | $ 262,000 |  |  |  | $ 262,000 |  |
Remaining stock option |  |  | 90,000 |  |  |  | 90,000 |  |
Employee and Directors [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Unrecognized compensation cost related to unvested options consultant |  |  | $ 215,000 |  |  |  | $ 215,000 |  |
2003 Stock Option Plan [Member] | Common Stock [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Shares issued |  |  |  |  |  |  | $ 26,427 |  |
2003 Stock Option Plan [Member] | Board of Directors Chairman [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Number of stock option shares granted | 6,000 |  |  |  |  |  |  |  |
Stock options, exercise price | $ 7.50 |  |  |  |  |  |  |  |
2017 Stock Option Plan [Member] | Consultant [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Number of stock option shares granted |  | 100,000 |  |  |  |  |  |  |
Stock options, exercise price |  | $ 3.65 |  |  |  |  |  |  |

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