Net Loss Per Common Share - Calculation of Net Income (Loss) Per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Numerator: Loss:
Loss from continuing operations	$ (1,368)	$ (1,916)	$ (22,616)	$ (1,574)	$ (2,687)	$ (7,512)	$ (327)	$ (738)	$ (27,474)	$ (11,264)	$ (9,748)
Income (loss) from discontinued operations, net of income taxes									(8,589)	3,868	4,921
Net loss									$ (36,063)	$ (7,396)	$ (4,827)
Denominator: Basic Weighted Average Common Shares Outstanding (in shares)									6,459	6,372	6,279
Basic net loss per common share
Income (loss) from continuing operations (in dollars per share)	$ (0.22)	$ (0.30)	$ (3.49)	$ (0.24)	$ (0.42)	$ (1.18)	$ (0.05)	$ (0.12)	$ (4.25)	$ (1.77)	$ (1.55)
Income (loss) from discontinued operations
Operating loss, net of taxes (in dollars per share)									(1.33)	0.61	0.78
Discontinued operations (in dollars per share)	(0.29)	(0.45)	(0.31)	(0.28)	0.48	0.02	0.00	0.11	(1.33)	0.61	0.78
Net income (loss) (in dollars per share)	(0.51)	(0.75)	(3.80)	(0.52)	0.06	(1.16)	(0.05)	(0.01)	$ (5.58)	$ (1.16)	$ (0.77)
Weighted Average Common Shares Outstanding:
Denominator: Basic Weighted Average Common Shares Outstanding (in shares)									6,459	6,372	6,279
Denominator: Diluted Weighted Average Common Shares Outstanding: (in shares)									6,459	6,372	6,279
Diluted net loss per common share
Income (loss) from continuing operations (in dollars per share)	(0.22)	(0.30)	(3.49)	(0.24)	(0.42)	(1.18)	(0.05)	(0.12)	$ (4.25)	$ (1.77)	$ (1.55)
Operating loss, net of taxes (in dollars per share)									(1.33)	0.61	0.78
Discontinued operations, net of taxes (in dollars per share)	(0.29)	(0.45)	(0.31)	(0.28)	0.48	0.02	0.00	0.11	(1.33)	0.61	0.78
Diluted net income (loss) per common share (in dollars per share)	$ (0.51)	$ (0.75)	$ (3.80)	$ (0.52)	$ 0.06	$ (1.16)	$ (0.05)	$ (0.01)	$ (5.58)	$ (1.16)	$ (0.77)