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Note 8. Stock Options and Restricted Stock Units (Details 1) - $ / shares | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Share-based Payment Arrangement [Abstract] |  |
Number of unvested options outstanding, beginning | 29,000 | 29,000
Number of unvested options vested | (14,500) | 0
Number of unvested options forfeited/cancelled | 0 | 0
Number of unvested options outstanding, ending | 14,500 | 29,000
Weighted average exercise price outstanding, beginning | $ 12.87 | $ 12.87
Weighted average exercise price vested | 12.87 | .00
Weighted average exercise price forfeited/cancelled | .00 | .00
Weighted average exercise price outstanding, ending | 12.87 | 12.87
Weighted average grant date fair value, beginning | 5.47 | 5.47
Weighted average grant date fair value vested | 5.47 | .00
Weighted average grant date fair value forfeited/cancelled | .00 | .00
Weighted average grant date fair value, ending | $ 5.47 | $ 5.47

X
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