Stock Compensation - Schedule of Stock Options and Stock Appreciation Rights (Details) - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Number of Share Underlying Awards
Outstanding, beginning of the period (in shares)	982,324	926,898
Granted (in shares)	324,450	201,535
Exercised (in shares)	0	0
Forfeited or expired (in shares)	(498,954)	(146,109)
Outstanding, ending of the period (in shares)	807,820	982,324	926,898
Exercisable, ending balance (in shares)	403,831	721,869
Vested and expected to vest, ending balance (in shares)	807,820	982,324
Weighted-Average Exercise Price
Outstanding, beginning balance (in dollars per share)	$ 9.38	$ 8.72
Granted (in dollars per share)	3.34	7.15
Exercised (in dollars per share)	0	0
Forfeited or expired (in dollars per share)	10.17	4.66
Outstanding, ending balance (in dollars per share)	6.44	9.38	$ 8.72
Exercisable (in dollars per share)	8.66	10.57
Vested and expected to vest, ending balance (in dollars per share)	$ 6.44	$ 9.38
Weighted-Average Remaining Contractual Term (years)
Outstanding	7 years 8 months 8 days	7 years 2 months 4 days	8 years 2 months 4 days
Granted	9 years 3 months	9 years 4 months 13 days
Exercised	0 years	0 years
Forfeited or expired	6 years 3 months 7 days	8 years 7 months 17 days
Exercisable, ending balance	6 years 5 months 23 days	6 years 9 months 10 days
Vested and expected to vest, ending balance	7 years 8 months 8 days	7 years 2 months 4 days
Weighted-Average Remaining Contractual Term (years)
Exercised	0 years	0 years
Forfeited or expired	5 years 8 months 1 day	0 years
Stock appreciation rights (SAR)
Number of Awards
Outstanding, beginning of the period (in shares)	105,925	75,625
Granted (in shares)	5,450	30,300
Exercised (in shares)	0	0
Forfeited or expired (in shares)	(27,500)	0
Outstanding, end of the period (in shares)	83,875	105,925	75,625
Exercisable end of the period (in shares)	76,558	103,125
Vested and expected to vest end of the period (in shares)	83,875	105,925
Weighted-Average Exercise Price
Outstanding, beginning balance (in dollars per share)	$ 9.12	$ 9.83
Granted (in dollars per share)	3.34	7.35
Exercised (in dollars per shares)	0	0
Forfeited or expired (in dollars per share)	12.00	0
Outstanding, ending balance (in dollars per share)	8.90	9.12	$ 9.83
Exercisable, ending balance (in dollars per share)	9.42	8.92
Vested and expected to vest, ending balance (in dollars per share)	$ 8.90	$ 9.12
Weighted-Average Remaining Contractual Term (years)
Outstanding	6 years	6 years 9 months	7 years 9 months
Granted	9 years 3 months	9 years 2 months 26 days
Exercisable	5 years 8 months 19 days	6 years 8 months 4 days
Vested and expected to vest	6 years	6 years 9 months