Stockholders' Equity - Stock Option Activity (Details) - USD ($)	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016	May 17, 2016
Stock Option
Weighted-average assumptions
Risk-free interest rate	0.00%	1.77%
Dividend yield (as a percent)	0.00%	0.00%
Expected volatility (as a percent)	0.00%	76.00%
Expected term	0 years	6 years 19 days
Number of Options
Balance outstanding at the beginning of the period (in shares)	5,528,628
Granted (in shares)	0
Exercised (in shares)	0
Cancelled / Forfeited (in shares)	(841,062)
Balance outstanding at the end of the period (in shares)	4,687,566
Vested and exercisable at the end of the period (in shares)	2,640,484
Weighted Average Exercise Price Per Share
Balance outstanding at the beginning of the period (in USD per share)	$ 5.49
Granted (in USD per share)	0.00
Exercised (in USD per share)	0.00
Canceled / Forfeited (in USD per share)	6.22
Balance outstanding at the end of the period (in USD per share)	5.36
Vested and exercisable at the end of the period (in USD per share)	$ 5.19
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures
Options outstanding, intrinsic value	$ 0		$ 0
Vested and exercisable at the end of the period, intrinsic value	$ 0
2014 EIP
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures
Authorized shares under the plan				7,500,000
Number of remaining shares available for issuance	2,563,428