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		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Accounting Policies [Abstract]
Securities excluded from net loss per share calculation (in shares)	0	62	31	90
Numerator:
Net loss	$ (946)	$ (1,920)	$ (6,065)	$ (6,114)
Denominator:
Basic weighted average common shares outstanding (in shares)	12,370	12,059	12,278	11,970
Diluted weighted average shares (in shares)	12,370	12,059	12,278	11,970