Condensed Consolidated Statements of Changes in Stockholders' Equity - 9 months ended Sep. 30, 2016 - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Treasury Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income	Accumulated Deficit
Balance at the beginning of the period at Dec. 31, 2015	$ 45,320	$ 1	$ 0	$ 125,369	$ 0	$ (80,050)
Balance at the beginning of the period (in shares) at Dec. 31, 2015		11,649	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock under employee stock option and stock purchase plans	386			386
Issuance of common stock under employee stock option and stock purchase plans (in shares)		92
Repurchase of common stock	0		$ 309	(309)
Repurchase of common stock (in shares)		(51)	51
Retirement of common stock	(309)		$ (309)
Retirement of common stock (in shares)			(51)
Stock-based compensation	1,076			1,076
Foreign currency translation adjustments	2				2
Net loss from continuing operations	(9,070)					(9,070)
Net loss from discontinued operations	(12)					(12)
Balance at the end of the period at Sep. 30, 2016	$ 37,393	$ 1	$ 0	$ 126,522	$ 2	$ (89,132)
Balance at the end of the period (in shares) at Sep. 30, 2016		11,690	0