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