Stock-Based Compensation - Schedule of SAR Activity (Details) - SARs - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Shares
Outstanding, beginning balance (in shares)	138,020	83,720
Granted (in shares)	9,000	60,000
Exercised (in shares)	0	0
Forfeited (in shares)	(7,334)	(1,000)
Expired (in shares)	(9,616)	(4,700)
Outstanding, ending balance (in shares)	130,070	138,020	83,720
Exercisable (in shares)	86,736	87,370
Weighted-Average Exercise Price
Outstanding, beginning balance (in dollars per share)	$ 9.66	$ 11.02
Granted (in dollars per share)	7.30	7.92
Exercised (in dollars per share)	0.00	0.00
Forfeited (in dollars per share)	9.81	11.25
Expired (in dollars per share)	10.70	11.25
Outstanding, ending balance (in dollars per share)	9.41	9.66	$ 11.02
Exercisable (in dollars per share)	$ 10.33	$ 11.14
Weighted-Average Remaining Contractual Term (years)
Outstanding (term)	7 years 2 months 16 days	8 years 20 days	8 years 2 months 16 days
Exercisable (term)	5 years 10 months 28 days	6 years 2 months 15 days
Aggregate Intrinsic Value (in thousands)
Outstanding	$ 11	$ 89	$ 1
Exercisable	$ 5	$ 5