(Loss) Earnings Per Share (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
Numerator:
Net (loss) income	$ (1,466)	$ 5,756	$ (19,920)	$ 172
Shares used in computing net (loss) income per share:
Weighted average basic shares outstanding - basic (in shares)	22,881,000	22,849,000	22,866,000	21,064,000
Effect of dilutive securities (in shares)	0	27,000	0	24,000
Weighted average common shares outstanding - diluted (in shares)	22,881,000	22,876,000	22,866,000	21,088,000
(Loss) earnings per common share:
(Loss) earnings per share of common stock — basic (in dollars per share)	$ (0.06)	$ 0.25	$ (0.87)	$ 0.01
(Loss) earnings per share of common stock — diluted (in dollars per share)	$ (0.06)	$ 0.25	$ (0.87)	$ 0.01
Antidilutive shares (in shares)	200,000	200,000	200,000	1,800,000
SARs
(Loss) earnings per common share:
Antidilutive shares (in shares)	0	0	0	0
Restricted Stock Awards
(Loss) earnings per common share:
Antidilutive shares (in shares)	0	0	0	0