CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock	Treasury Stock	Additional Paid- in Capital	Accumulated Deficit	Accumulated Other Comprehensive Loss
BALANCE (in shares) at Dec. 31, 2018		15,282,000
BALANCE at Dec. 31, 2018	$ 102,518	$ 157	$ (5,017)	$ 391,927	$ (283,643)	$ (906)
Stock issued upon option exercise and vesting of restricted stock units (in shares)		204,000
Stock issued upon option exercise and vesting of restricted stock units	848	$ 2		846
Share based compensation	2,268			2,268
Stock issued under the employee stock purchase plan (in shares)		105,000
Stock issued under the employee stock purchase plan	508	$ 1		507
Stock issued upon acquisition (in shares)		123,000
Stock issued upon acquisition	555	$ 1		554
Net income (loss)	30,001				30,001
Disposal of discontinued operations	1,472					1,472
Other comprehensive income	(591)					(591)
BALANCE (in shares) at Dec. 31, 2019		15,714,000
BALANCE at Dec. 31, 2019	$ 137,579	$ 161	(5,017)	396,102	(253,642)	(25)
Stock issued upon option exercise and vesting of restricted stock units (in shares)	130,000	207,000
Stock issued upon option exercise and vesting of restricted stock units	$ 729	$ 2		727
Share based compensation	2,365			2,365
Stock issued under the employee stock purchase plan (in shares)		59,000
Stock issued under the employee stock purchase plan	292			292
Shares issued, net of issuance cost (in shares)		2,990,000
Shares issued, net of issuance costs	20,371	$ 30		20,341
Net income (loss)	(16,311)				(16,311)
Other comprehensive income	629					629
BALANCE (in shares) at Dec. 31, 2020		18,970,000
BALANCE at Dec. 31, 2020	$ 145,654	$ 193	$ (5,017)	$ 419,827	$ (269,953)	$ 604