Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Balance (in shares) at Dec. 31, 2020	37,554,162
Balance at Dec. 31, 2020	$ 4	$ 71,705	$ (25,310)	$ 15	$ 46,414
Common shares issued upon exercise of stock options (in shares)	75,000
Common shares issued upon exercise of stock options		113			113
Share-based compensation expense		859			859
Common shares issued upon vesting of restricted stock units (in shares)	64,660
Net unrealized gain on short-term investments	$ 0	0	0	2	2
Net loss for the period			(5,429)		(5,429)
Common shares issued for services (in shares)	17,876
Common shares issued for services		100			100
Net loss			(5,429)		(5,429)
Balance (in shares) at Mar. 31, 2021	37,711,698
Balance at Mar. 31, 2021	$ 4	72,777	(30,739)	17	42,059
Balance (in shares) at Dec. 31, 2021	40,851,945
Balance at Dec. 31, 2021	$ 4	91,025	(49,759)	(6)	$ 41,264
Common shares issued upon exercise of stock options (in shares)	50,000				50,000
Common shares issued upon exercise of stock options		75			$ 75
Share-based compensation expense		1,029			1,029
Common shares issued upon vesting of restricted stock units (in shares)	49,252
Net unrealized gain on short-term investments				(23)	(23)
Net loss for the period			(5,432)		(5,432)
Net loss			(5,432)		(5,432)
Balance (in shares) at Mar. 31, 2022	40,951,197
Balance at Mar. 31, 2022	$ 4	$ 92,129	$ (55,191)	$ (29)	$ 36,913