CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock	Treasury Stock	Additional Paid- in Capital	Accumulated Deficit
Beginning balance at Dec. 31, 2019	$ 42,084	$ 12	$ (1,255)	$ 59,187	$ (15,860)
Beginning balances, shares at Dec. 31, 2019		11,657,912	(103,147)
Vesting of restricted stock units		$ 1		1
Vesting of restricted stock units, Shares		734,170
Increase in treasury stock resulting from shares withheld to cover statutory taxes	(1,828)		$ (1,828)
Increase in treasury stock resulting from shares withheld to cover statutory taxes, Shares			(121,608)
Retirement of of treasury stock	3,083		$ 3,083	(3,083)
Retirement of of treasury stock, Shares		(224,755)	224,755
Share-based compensation	9,902				9,902
Net income (loss)	(6,813)				(6,813)
Ending balance at Dec. 31, 2020	43,345	$ 13		66,005	(22,673)
Ending balances, shares at Dec. 31, 2020		12,167,327
Vesting of restricted stock units, Shares		911,698
Increase in treasury stock resulting from shares withheld to cover statutory taxes	(3,327)		$ (3,327)
Increase in treasury stock resulting from shares withheld to cover statutory taxes, Shares			(143,400)
Issuance of common stock upon direct offering to certain investors, net of issuance costs of $86	20,924	$ 20,924
Issuance of common stock upon direct offering to certain investors, net of costs, Shares		552,915
Retirement of of treasury stock	3,327		$ 3,327	(3,327)
Retirement of of treasury stock, Shares		(143,400)	143,400
Share-based compensation	7,832			7,832
Net income (loss)	655				655
Ending balance at Dec. 31, 2021	$ 69,429	$ 13		$ 91,434	$ (22,018)
Ending balances, shares at Dec. 31, 2021		13,488,540