Loss Per Share - Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Earnings Per Share [Abstract]
Net loss	$ (115)	$ (2,299)	$ (19,140)	$ (11,798)
Less: Dividend paid in-kind to preferred stockholders	(82)	0	(182)	0
Less: Deemed dividend on preferred stock	(111)	0	(3,981)	0
Net loss attributable to common stockholders	(308)	(2,299)	(23,303)	(11,798)
Loss per share - basic:
Numerator for basic loss per share	$ (308)	$ (2,299)	$ (23,303)	$ (11,798)
Denominator for basic loss per share (shares)	14,717,043	14,632,988	14,702,624	14,632,988
Basic loss per common share (usd per share)	$ (0.02)	$ (0.16)	$ (1.58)	$ (0.81)
Loss per share - diluted:
Numerator for basic loss per share	$ (308)	$ (2,299)	$ (23,303)	$ (11,798)
Plus: Warrant revaluation income for dilutive warrants	46	0	0	1,958
Net loss attributable to common stockholders - diluted	$ (354)	$ (2,299)	$ (23,303)	$ (13,756)
Denominator for basic loss per share (shares)	14,717,043	14,632,988	14,702,624	14,632,988
Incremental shares underlying dilutive in the money warrants outstanding (shares)	16,275	0	0	8,008
Denominator for diluted loss per share (shares)	14,733,318	14,632,988	14,702,624	14,640,996
Diluted net loss per common share (usd per share)	$ (0.02)	$ (0.16)	$ (1.58)	$ (0.94)