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v3.21.1

Capital Stock, Stock Plans, Warrants, and Stock-Based Compensation (Details Narrative) - USD ($) $ / shares in Units, $ in Thousands |  |  | 1 Months Ended | 3 Months Ended
--- | --- | --- | --- | ---
Apr. 02, 2019 | Jul. 27, 2017 | May 31, 2018 | Mar. 31, 2021
Unrecognized compensation cost related to unvested options consultant |  |  |  | $ 229
Weighted average term for unrecognized and unvested option to be recognized |  |  |  | 2 years
Ferguson Stock Option [Member] |  |  |  |
Options to purchase shares of common stock |  | 30,000 |  |
Options extended date description |  | The Company's Common Stock was previously extended to December 31, 2021 and December 31, 2022, respectively. |  |
Ferguson Stock Option [Member] |  |  |  |
Options to purchase shares of common stock |  | 60,000 |  |
Robert Ferguson [Member] |  |  |  |
Number of options exercised |  |  | 10,000 |
Unrecognized compensation cost related to unvested options consultant |  |  |  | $ 262
Remaining stock option |  |  |  | 90,000
Loans payable | $ 2,500 |  |  |
Warrant to purchase | 60,000 |  |  |
Warrants exercise price | $ 3.51 |  |  |
Warrant exercisable, description | The Warrant is exercisable six months from April 1, 2019 and expires on April 1, 2024 and remains outstanding at December 31, 2020 |  |  |
2017 Stock Option Plan [Member] | Consultant [Member] |  |  |  |
Number of stock option shares granted |  | 100,000 |  |
Stock options, exercise price |  | $ 3.65 |  |
2003 Outside Directors Stock Plan [Member] |  |  |  |
Stock issued during period for services, shares |  |  |  | 11,837
Allocated share-based compensation expense |  |  |  | $ 107

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