Consolidated Statement of Stockholders' Equity - USD ($) $ in Thousands	Common Stock	Treasury Stock	Other Comprehensive Income (Loss)	Additional Paid-In Capital	Retained Earnings	Total
Beginning balance, shares at Dec. 31, 2019	30,303,395
Beginning treasury stock, shares at Dec. 31, 2019		(711,231)
Beginning balance at Dec. 31, 2019	$ 303	$ (6,540)	$ (1,045)	$ 182,523	$ (37,220)	$ 138,021
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation				462		462
Issue restricted stock, shares	185,356
Issuance of restricted stock	$ 2			(2)
Forfeiture of restricted stock (in shares)	(3,351)
Cash flow hedge			(984)			(984)
Net income (loss)					2,723	2,723
Ending balance, shares at Mar. 31, 2020	30,485,400
Ending treasury stock, shares at Mar. 31, 2020		(711,231)
Ending balance at Mar. 31, 2020	$ 305	$ (6,540)	(2,029)	182,983	(34,497)	140,222
Beginning balance, shares at Dec. 31, 2019	30,303,395
Beginning treasury stock, shares at Dec. 31, 2019		(711,231)
Beginning balance at Dec. 31, 2019	$ 303	$ (6,540)	(1,045)	182,523	(37,220)	138,021
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)						16,554
Ending balance, shares at Sep. 30, 2020	31,126,326
Ending treasury stock, shares at Sep. 30, 2020		(711,231)
Ending balance at Sep. 30, 2020	$ 311	$ (6,540)	(1,795)	184,214	(20,666)	155,524
Beginning balance, shares at Mar. 31, 2020	30,485,400
Beginning treasury stock, shares at Mar. 31, 2020		(711,231)
Beginning balance at Mar. 31, 2020	$ 305	$ (6,540)	(2,029)	182,983	(34,497)	140,222
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation				1,167		1,167
Payments related to tax withholding for stock-based compensation, shares	(9,727)
Payments related to tax withholding for stock-based compensation				(24)		(24)
Issue restricted stock, shares	638,938
Issuance of restricted stock	$ 6			(6)
Forfeiture of restricted stock (in shares)	(54,510)
Cash flow hedge			40			40
Net income (loss)					2,028	2,028
Ending balance, shares at Jun. 30, 2020	31,060,101
Ending treasury stock, shares at Jun. 30, 2020		(711,231)
Ending balance at Jun. 30, 2020	$ 311	$ (6,540)	(1,989)	184,120	(32,469)	143,433
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation				258		258
Issue restricted stock, shares	118,750
Issuance of restricted stock	$ 1			(1)
Purchase of vested stock-based awards, shares	(52,525)
Purchase of vested stock-based awards	$ (1)			(163)		(164)
Cash flow hedge			194			194
Net income (loss)					11,803	11,803
Ending balance, shares at Sep. 30, 2020	31,126,326
Ending treasury stock, shares at Sep. 30, 2020		(711,231)
Ending balance at Sep. 30, 2020	$ 311	$ (6,540)	(1,795)	184,214	(20,666)	$ 155,524
Beginning balance, shares at Dec. 31, 2020	31,171,804					31,171,804
Beginning treasury stock, shares at Dec. 31, 2020		(711,231)				(711,231)
Beginning balance at Dec. 31, 2020	$ 312	$ (6,540)	(1,602)	184,324	(17,000)	$ 159,494
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation				383		383
Exercise of stock options, shares	23,755
Exercise of stock options				86		86
Payments related to tax withholding for stock-based compensation, shares	(6,673)
Payments related to tax withholding for stock-based compensation				(36)		(36)
Cash flow hedge			230			230
Net income (loss)					928	928
Ending balance, shares at Mar. 31, 2021	31,188,886
Ending treasury stock, shares at Mar. 31, 2021		(711,231)
Ending balance at Mar. 31, 2021	$ 312	$ (6,540)	(1,372)	184,757	(16,072)	$ 161,085
Beginning balance, shares at Dec. 31, 2020	31,171,804					31,171,804
Beginning treasury stock, shares at Dec. 31, 2020		(711,231)				(711,231)
Beginning balance at Dec. 31, 2020	$ 312	$ (6,540)	(1,602)	184,324	(17,000)	$ 159,494
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)						$ (5,737)
Ending balance, shares at Sep. 30, 2021	31,779,706					31,779,706
Ending treasury stock, shares at Sep. 30, 2021		(711,231)				(711,231)
Ending balance at Sep. 30, 2021	$ 318	$ (6,540)		185,633	(22,737)	$ 156,674
Beginning balance, shares at Mar. 31, 2021	31,188,886
Beginning treasury stock, shares at Mar. 31, 2021		(711,231)
Beginning balance at Mar. 31, 2021	$ 312	$ (6,540)	(1,372)	184,757	(16,072)	161,085
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation				1,245		1,245
Payments related to tax withholding for stock-based compensation, shares	(32,755)
Payments related to tax withholding for stock-based compensation	$ (1)			(204)		(205)
Issue restricted stock, shares	489,850
Issuance of restricted stock	$ 5			(5)
Forfeiture of restricted stock (in shares)	(27,983)
Cash flow hedge			$ 1,372			1,372
Net income (loss)					3,530	3,530
Ending balance, shares at Jun. 30, 2021	31,617,998
Ending treasury stock, shares at Jun. 30, 2021		(711,231)
Ending balance at Jun. 30, 2021	$ 316	$ (6,540)		185,793	(12,542)	167,027
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation				526		526
Exercise of stock options, shares	4,791
Exercise of stock options				24		24
Payments related to tax withholding for stock-based compensation, shares	(130,764)
Payments related to tax withholding for stock-based compensation	$ (1)			(707)		(708)
Issue restricted stock, shares	287,681
Issuance of restricted stock	$ 3			(3)
Net income (loss)					(10,195)	$ (10,195)
Ending balance, shares at Sep. 30, 2021	31,779,706					31,779,706
Ending treasury stock, shares at Sep. 30, 2021		(711,231)				(711,231)
Ending balance at Sep. 30, 2021	$ 318	$ (6,540)		$ 185,633	$ (22,737)	$ 156,674