Stockholders' Equity, Stock Options (Details) - USD ($)		3 Months Ended		9 Months Ended		12 Months Ended
	Jun. 15, 2016	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Stock Options [Member]
Stock option activity, number of shares [Roll Forward]
Outstanding options, beginning of period (in shares)				3,669,469
Granted (in shares)				1,962,093
Exercised (in shares)				(555)
Forfeited (in shares)				(1,155,747)
Outstanding options, end of period (in shares)		4,475,260		4,475,260		3,669,469
Options vested and expected to vest (in shares)		4,278,402		4,278,402
Exercisable (in shares)		2,031,446		2,031,446
Weighted average exercise price per share [Roll Forward]
Outstanding options, beginning of period (in dollars per share)				$ 2.74
Granted (in dollars per share)				0.84
Exercised (in dollars per share)				0.84
Forfeited (in dollars per share)				2.56
Outstanding options, end of period (in dollars per share)		$ 1.95		1.95		$ 2.74
Options vested and expected to vest (in dollars per share)		1.99		1.99
Exercisable (in dollars per share)		$ 2.72		$ 2.72
Additional disclosures [Abstract]
Options outstanding, weighted average remaining contractual term				7 years 4 months 10 days		6 years 7 months 28 days
Options vested and expected to vest, weighted average remaining contractual term				7 years 3 months 11 days
Options exercisable, weighted average remaining contractual term				5 years 4 months 2 days
Options outstanding, aggregate intrinsic value		$ 23,000		$ 23,000		$ 0
Options vested and expected to vest, aggregate intrinsic value		21,000		21,000
Options exercisable, aggregate intrinsic value		3,000		3,000
Options exercised in period, aggregate intrinsic value		0	$ 0	0	$ 0
Fair value of options vested		270,000	$ 263,000	689,000	$ 523,000
Compensation cost not yet recognized [Abstract]
Unrecognized compensation cost related to stock options		$ 971,000		$ 971,000
Weighted average period of recognition for unrecognized compensation cost				2 years 4 months 17 days
June 15, 2016 Award [Member] | Time-based Stock Options [Member] | Corporate Employees [Member]
Stock option activity, number of shares [Roll Forward]
Granted (in shares)	992,000
Compensation cost not yet recognized [Abstract]
Vesting period				3 years