Debt - Schedule of Debt (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Schedule Of Long Term Debt And Short Term Debt Instruments [Line Items]
Long-term debt	$ 55,497
Finance leases and other debt	1,087	$ 456
Unamortized debt issuance costs	(235)	(288)
Total long-term debt and finance leases	55,852	55,168
Less: Current maturities of long-term debt and finance leases	195	80
Long-term debt	55,657	55,088
Debt issuance costs	300	1,000
Unsecured senior notes
Schedule Of Long Term Debt And Short Term Debt Instruments [Line Items]
Long-term debt	55,000	55,000
Wells Fargo revolving credit facility
Schedule Of Long Term Debt And Short Term Debt Instruments [Line Items]
Short-term financing	$ 39,527	$ 54,613