Stockholder's Equity, Stock Options (Details) - Stock Options [Member] - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended			9 Months Ended		12 Months Ended
	Sep. 30, 2017	Mar. 31, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Stock option activity, number of shares [Roll Forward]
Outstanding options, beginning of period (in shares)		1,381,843		1,381,843
Granted (in shares)				2,000
Exercised (in shares)				0
Forfeited (in shares)				(966,751)
Outstanding options, end of period (in shares)	417,092			417,092		1,381,843
Options vested and expected to vest (in shares)	405,254			405,254
Exercisable (in shares)	267,171			267,171
Weighted average exercise price per share [Roll Forward]
Outstanding options, beginning of period (in dollars per share)		$ 5.88		$ 5.88
Granted (in dollars per share)				2.57
Exercised (in dollars per share)				0
Forfeited (in dollars per share)				6.03
Outstanding options, end of period (in dollars per share)	$ 5.50			5.50		$ 5.88
Options vested and expected to vest (in dollars per share)	5.58			5.58
Exercisable (in dollars per share)	$ 7.08			$ 7.08
Additional disclosures [Abstract]
Options outstanding, weighted average remaining contractual term				6 years 11 days		4 years 11 months 12 days
Options vested and expected to vest, weighted average remaining contractual term				5 years 11 months 12 days
Options exercisable, weighted average remaining contractual term				4 years 6 months 25 days
Options outstanding, aggregate intrinsic value	$ 0			$ 0		$ 50
Options vested and expected to vest, aggregate intrinsic value	0			0
Options exercisable, aggregate intrinsic value	0			0
Options exercised in period, aggregate intrinsic value	0		$ 0	0	$ 0
Fair value of options vested	36		$ 270	169	$ 689
Compensation cost not yet recognized [Abstract]
Unrecognized compensation cost related to stock options	$ 135			$ 135
Weighted average period of recognition for unrecognized compensation cost				2 years 1 month 6 days
Chief Financial Officer [Member]
Stock option activity, number of shares [Roll Forward]
Forfeited (in shares)		(50,000)
Compensation cost not yet recognized [Abstract]
Reversal of previously recorded stock based compensation expense		$ 58