Stock-Based Compensation Stock-Based Compensation - Stock Option Activity (Details) - Stock Options - Incentive Plan	9 Months Ended
	Sep. 30, 2018 USD ($) $ / shares shares
Number of Options
Outstanding, beginning of period (in shares) | shares	1,116,750
Granted (in shares) | shares	0
Exercised (in shares) | shares	0
Expired or forfeited (in shares) | shares	(167,750)
Outstanding, end of period (in shares) | shares	949,000
Number of Shares, exercisable (in shares) | shares	949,000
Weighted- Average Exercise Price
Outstanding, beginning of period (in dollars per share) | $ / shares	$ 6.34
Granted (in dollars per share) | $ / shares
Exercised (in dollars per share) | $ / shares
Expired or forfeited (in dollars per share) | $ / shares	15.19
Outstanding, end of period (in dollars per share) | $ / shares	4.78
Weighted average exercise price, exercisable (in dollars per share) | $ / shares	$ 4.78
Weighted- Average Remaining Contractual Term, Outstanding	4 years 10 months 2 days
Weighted- Average Remaining Contractual Term, Exercisable	4 years 10 months 2 days
Aggregate Intrinsic Value, Outstanding | $	$ 58,960
Aggregate Intrinsic Value, Exercisable | $	58,960
Unrecognized compensation costs | $	$ 0