CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-In Capital [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Loss [Member]	Retained Earnings [Member]	Total
Balances at Dec. 31, 2016	$ 2	$ 267,400	$ (5,295)	$ (2,329)	$ (202,470)	$ 57,308
Balances (in shares) at Dec. 31, 2016	18,548,180
Net loss					(1,526)	(1,526)
Partial shares in reverse split		(1)				(1)
Partial shares in reverse split (in shares)	(40)
Other comprehensive income				221		221
Stock-based compensation expense		430				430
Issuance of common stock upon exercise of stock options for cash and releases of RSUs (in shares)	153,824
Issuance of common stock under employee stock purchase plan	$ 28					28
Issuance of common stock under employee stock purchase plan (in shares)	28,018
Repurchase of common stock			(2)			(2)
Repurchase of common stock (in shares)	(1,070)
Balances at Dec. 31, 2017	$ 2	267,857	(5,297)	(2,108)	(203,996)	$ 56,458
Balances (in shares) at Dec. 31, 2017	18,728,912					18,728,192
Net loss					(9,100)	$ (9,100)
Other comprehensive income				(399)		(399)
Stock-based compensation expense		680				680
Issuance of common stock upon exercise of stock options for cash and releases of RSUs		185				185
Issuance of common stock upon exercise of stock options for cash and releases of RSUs (in shares)	194,965
Issuance of common stock under employee stock purchase plan		72				72
Issuance of common stock under employee stock purchase plan (in shares)	31,387
Balances at Dec. 31, 2018	$ 2	$ 268,794	$ (5,297)	$ (2,507)	$ (213,096)	$ 47,896
Balances (in shares) at Dec. 31, 2018	18,955,264					18,955,264