Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Total
Balance at Dec. 31, 2019	$ 426	$ 117,557	$ (72,872)	$ 45,111
Balance (in shares) at Dec. 31, 2019	42,628,560
Stock compensation expense		333		333
Net Income (loss)			(499)	(499)
Balance at Jun. 30, 2020	$ 426	117,890	(73,371)	44,945
Balance (in shares) at Jun. 30, 2020	42,628,560
Balance at Dec. 31, 2019	$ 426	117,557	(72,872)	$ 45,111
Balance (in shares) at Dec. 31, 2019	42,628,560
Issuance of common stock upon exercise of stock options (in shares)				1,967,562
Balance at Dec. 31, 2020	$ 433	118,269	(78,080)	$ 40,622
Balance (in shares) at Dec. 31, 2020	43,347,887
Balance at Mar. 31, 2020	$ 426	117,682	(75,757)	42,351
Balance (in shares) at Mar. 31, 2020	42,628,560
Stock compensation expense		208		208
Net Income (loss)			2,386	2,386
Balance at Jun. 30, 2020	$ 426	117,890	(73,371)	44,945
Balance (in shares) at Jun. 30, 2020	42,628,560
Balance at Dec. 31, 2020	$ 433	118,269	(78,080)	40,622
Balance (in shares) at Dec. 31, 2020	43,347,887
Issuance of common stock upon exercise of stock options	$ 4			$ 4
Issuance of common stock upon exercise of stock options (in shares)	359,505			1,073,571
Stock compensation expense		370		$ 370
Net Income (loss)			10,201	10,201
Balance at Jun. 30, 2021	$ 437	118,639	(67,879)	51,197
Balance (in shares) at Jun. 30, 2021	43,707,392
Balance at Mar. 31, 2021	$ 434	118,630	(79,156)	39,908
Balance (in shares) at Mar. 31, 2021	43,371,691
Issuance of common stock upon exercise of stock options	$ 3			3
Issuance of common stock upon exercise of stock options (in shares)	335,701
Stock compensation expense		9		9
Net Income (loss)			11,277	11,277
Balance at Jun. 30, 2021	$ 437	$ 118,639	$ (67,879)	$ 51,197
Balance (in shares) at Jun. 30, 2021	43,707,392