Earnings per Share - Reconciliation (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Numerator for basic and diluted EPS — net income (loss)	$ (9,375)	$ 14,929	$ (31,916)	$ (13,154)
Denominator for basic EPS — weighted average number of shares	18,962,834	23,546,249	18,918,291	24,202,310
Add — dilutive effect of:
Restricted stock units	0	2,000	0	0
Denominator for diluted EPS — weighted average number of shares and dilutive securities	18,962,834	23,548,495	18,918,291	24,202,310
Earnings per share:
Basic (usd per share)	$ (0.49)	$ 0.63	$ (1.69)	$ (0.54)
Diluted (usd per share)	$ (0.49)	$ 0.63	$ (1.69)	$ (0.54)
Pro Forma
Add — dilutive effect of:
Denominator for diluted EPS — weighted average number of shares and dilutive securities	22,284,299		22,507,310	24,519,574