CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Series B convertible preferred stock	Common Stock	Additional Paid-in Capital	Treasury Stock	Accumulated Deficit	Accumulated Other Comprehensive Income	Noncontrolling Interest
Beginning Balances at Dec. 31, 2018	$ 33,700	$ 5	$ 17	$ 444,145	$ (8,153)	$ (404,353)	$ 2,209	$ (170)
Beginning Balances (in shares) at Dec. 31, 2018		5,000	15,967
Net loss	(815)					(815)
Unrealized loss from foreign currency translation adjustments	(129)						(129)
Issuance of common stock in connection with acquisition of business	1,635		$ 1	1,634
Issuance of common stock in connection with vesting of stock awards (shares)			126
Stock-based compensation	687			687
Shares withheld in payment of taxes in connection with net share settlement of restricted stock units	(228)				(228)
Shares withheld in payment of taxes in connection with net share settlement of restricted stock units (shares)			(43)
Issuance of common stock in connection with warrant exercise (shares)			10
Ending Balances at Mar. 31, 2019	34,850	$ 5	$ 18	446,466	(8,381)	(405,168)	2,080	$ (170)
Ending Balances (in shares) at Mar. 31, 2019		5,000	16,479
Issuance of common stock in connection with acquisition of business (shares)			419
Beginning Balances at Dec. 31, 2019	35,466	$ 5	$ 18	447,965	(9,043)	(405,504)	2,025
Beginning Balances (in shares) at Dec. 31, 2019		5,000	16,986
Net loss	(2,047)					(2,047)
Unrealized loss from foreign currency translation adjustments	(480)						(480)
Issuance of common stock in connection with vesting of stock awards (shares)			150
Stock-based compensation	640			640
Shares withheld in payment of taxes in connection with net share settlement of restricted stock units	(225)				(225)
Shares withheld in payment of taxes in connection with net share settlement of restricted stock units (shares)			(48)
Issuance of common stock in connection with warrant exercise			$ 1	(1)
Issuance of common stock in connection with warrant exercise (shares)			387
Ending Balances at Mar. 31, 2020	$ 33,354	$ 5	$ 19	$ 448,604	$ (9,268)	$ (407,551)	$ 1,545
Ending Balances (in shares) at Mar. 31, 2020		5,000	17,475