Basis of Presentation and Summary of Significant Accounting Policies - Reconciliation of Basic and Diluted Loss per Share (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Numerator:
Loss from continuing operations	$ (3,114)	$ (3,916)	$ (7,636)	$ (5,893)
Loss from discontinued operations	0	0	0	(12)
Net loss	$ (3,114)	$ (3,916)	$ (7,636)	$ (5,905)
Denominator:
Basic weighted average common shares outstanding (in shares)	11,791	11,657	11,755	11,653
Potential common shares from equity awards and warrants (in shares)	0	0	0	0
Diluted weighted average shares (in shares)	11,791	11,657	11,755	11,653