Stock-Based Compensation - Restricted Stock Unit Activity (Details) - Incentive Plan - Restricted Stock	3 Months Ended
	Mar. 31, 2018 $ / shares shares
Shares (in shares)
Beginning balance (in shares) | shares	1,359,162
Granted (in shares) | shares	0
Forfeited (in shares) | shares	(66,665)
Vested (in shares) | shares	(44,445)
Ending balance (in shares) | shares	1,248,052
Weighted Average Grant Date Fair Value (in Dollars per share)
Beginning balance (in dollars per share) | $ / shares	$ 1.28
Granted (in dollars per share) | $ / shares	0.00
Forfeited (in dollars per share) | $ / shares	1.59
Vested (in dollars per share) | $ / shares	1.59
Ending balance (in dollars per share) | $ / shares	$ 1.25