CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Series B Preferred Stock	Common Stock	Additional Paid-in Capital	Treasury Stock	Accumulated Deficit	Accumulated Other Comprehensive Income	Noncontrolling Interest
Beginning Balances at Dec. 31, 2017	$ 23,853	$ 3	$ 15	$ 428,470	$ (7,485)	$ (399,647)	$ 2,675	$ (178)
Beginning Balances (in shares) at Dec. 31, 2017		3,000	14,436
Net loss	(2,301)					(2,306)		5
Unrealized income (loss) from foreign currency translation adjustments	112						109	3
Impact of adoption of Topic 606 | Topic 606	2					2
Issuance of common stock in connection with acquisition of business	2,294		$ 1	2,293
Issuance of common stock in connection with acquisition of business (shares)			610
Issuance of common stock in connection with vesting of stock awards (shares)			139
Stock-based compensation	635			635
Shares withheld in payment of taxes in connection with net share settlement of restricted stock units	(162)				(162)
Shares withheld in payment of taxes in connection with net share settlement of restricted stock units (shares)			(42)
Issuance costs associated with issuance of Series B preferred stock	(20)			(20)
Issuance of shares to non-employees	5			5
Ending Balances at Mar. 31, 2018	24,418	$ 3	$ 16	431,383	(7,647)	(401,951)	2,784	(170)
Ending Balances (in shares) at Mar. 31, 2018		3,000	15,143
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 income (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 acquisition of business (shares)			419
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