CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-In Capital [Member]	Treasury stock [Member]	Accumulated Deficit [Member]
Beginning Balance at Dec. 31, 2020	$ 29,943	$ 6	$ 353	$ 293,400		$ (263,816)
Beginning Balance (in shares) at Dec. 31, 2020		568	35,281,183
Issuance of common stock from stock option awards	$ (765)		$ 13	(778)
Issuance of common stock from stock options awards, shares	1,895,437		1,268,399
Issuance of restricted common stock	$ 76			76
Issuance of restricted common stock, shares			25,000
Issuance of common stock due to conversion of Series N Preferred stock, shares		(3)	120
Stock-based compensation expense	332			332
Net income	3,053					3,053
Ending Balance at Dec. 31, 2021	32,639	$ 6	$ 366	293,030		(260,763)
Ending Balance (in shares) at Dec. 31, 2021		565	36,574,702
Issuance of common stock from stock option awards	$ 22		$ 2	20
Issuance of common stock from stock options awards, shares	339,125		242,475
Issuance of restricted common stock	$ 134		$ 1	133
Issuance of restricted common stock, shares			115,000
Stock-based compensation expense	406			406
Repurchase of common stock	(395)				$ (395)
Repurchase of common stock, shares					243,468
Net income	15,493					15,493
Ending Balance at Dec. 31, 2022	$ 48,299	$ 6	$ 369	$ 293,589	$ 395	$ (245,270)
Ending Balance (in shares) at Dec. 31, 2022		565	36,932,177		243,468