CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS’ EQUITY (UNAUDITED) - USD ($) $ in Thousands	Total	Restricted Stock	Common Stock	Common Stock Restricted Stock	Treasury Stock	Treasury Stock Restricted Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income
Beginning balance (in shares) at Dec. 31, 2019			40,234,451		740,957
Beginning balance at Dec. 31, 2019	$ 245,556		$ 40		$ (2,979)		$ 165,223	$ 83,313	$ (41)
Increase (Decrease) in Stockholders' Equity
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent	(163)								(163)
Vesting of restricted stock (in shares)			139,947
APIC, Share-based Payment Arrangement, Restricted Stock Unit, Increase for Cost Recognition	1,025						1,025
APIC, Share-based Payment Arrangement, ESPP, Increase for Cost Recognition	14						14
Employee stock purchase plan issuance (in shares)			21,486
Stock Issued During Period, Value, Employee Stock Purchase Plan	46						46
Stock buy back (in shares)			(778,300)	(10,468)	778,300	10,468
Stock buy back	(1,000)	$ (14)			$ (1,000)	$ (14)
Net (loss) income	(84)							(84)
Ending balance (in shares) at Mar. 31, 2020			39,607,116		1,529,725
Ending balance at Mar. 31, 2020	245,380		$ 40		$ (3,993)		166,308	83,229	(204)
Beginning balance (in shares) at Dec. 31, 2019			40,234,451		740,957
Beginning balance at Dec. 31, 2019	245,556		$ 40		$ (2,979)		165,223	83,313	(41)
Increase (Decrease) in Stockholders' Equity
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent	317
Net (loss) income	40,839
Ending balance (in shares) at Sep. 30, 2020			41,281,583		1,561,168
Ending balance at Sep. 30, 2020	290,727		$ 42		$ (4,025)		170,282	124,152	276
Beginning balance (in shares) at Mar. 31, 2020			39,607,116		1,529,725
Beginning balance at Mar. 31, 2020	245,380		$ 40		$ (3,993)		166,308	83,229	(204)
Increase (Decrease) in Stockholders' Equity
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent	384								384
Vesting of restricted stock (in shares)			177,628
APIC, Share-based Payment Arrangement, Restricted Stock Unit, Increase for Cost Recognition	943						943
APIC, Share-based Payment Arrangement, ESPP, Increase for Cost Recognition	12						12
Employee stock purchase plan issuance (in shares)			0
Stock Issued During Period, Value, Employee Stock Purchase Plan	0						0
Stock buy back (in shares)				(30,673)		30,673
Stock buy back		(31)				$ (31)
Net (loss) income	4,641							4,641
Ending balance (in shares) at Jun. 30, 2020			39,754,071		1,560,398
Ending balance at Jun. 30, 2020	251,329		$ 40		$ (4,024)		167,263	87,870	180
Increase (Decrease) in Stockholders' Equity
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent	96								96
Vesting of restricted stock (in shares)			6,375
APIC, Share-based Payment Arrangement, Restricted Stock Unit, Increase for Cost Recognition	941						941
APIC, Share-based Payment Arrangement, ESPP, Increase for Cost Recognition	3						3
Employee stock purchase plan issuance (in shares)			18,148
Stock Issued During Period, Value, Employee Stock Purchase Plan	16						16
Stock buy back (in shares)				(770)		770
Stock buy back		(1)				$ (1)
Net (loss) income	36,282							36,282
Ending balance (in shares) at Sep. 30, 2020			41,281,583		1,561,168
Ending balance at Sep. 30, 2020	290,727		$ 42		$ (4,025)		170,282	124,152	276
Beginning balance (in shares) at Dec. 31, 2020			41,575,129		1,618,265
Beginning balance at Dec. 31, 2020	288,807		$ 42		$ (4,134)		171,209	121,267	423
Increase (Decrease) in Stockholders' Equity
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent	125								125
Stock Issued During Period, Value, Acquisitions	20						20
Stock Issued During Period, Shares, Acquisitions			14,430
Vesting of restricted stock (in shares)			158,364
APIC, Share-based Payment Arrangement, Restricted Stock Unit, Increase for Cost Recognition	678						678
APIC, Share-based Payment Arrangement, ESPP, Increase for Cost Recognition	7						7
Employee stock purchase plan issuance (in shares)			19,483
Stock Issued During Period, Value, Employee Stock Purchase Plan	17						17
Stock buy back (in shares)				(48,077)		48,077
Stock buy back		$ (140)				$ (140)
Net (loss) income	(3,912)							(3,912)
Ending balance (in shares) at Mar. 31, 2021			41,719,329		1,666,342
Ending balance at Mar. 31, 2021	285,602		$ 42		$ (4,274)		171,931	117,355	548
Beginning balance (in shares) at Dec. 31, 2020			41,575,129		1,618,265
Beginning balance at Dec. 31, 2020	288,807		$ 42		$ (4,134)		171,209	121,267	423
Increase (Decrease) in Stockholders' Equity
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent	(70)
Stock Issued During Period, Value, Acquisitions	2,061		$ 2				2,059
Stock Issued During Period, Shares, Acquisitions			1,503,759
Vesting of restricted stock (in shares)		325,000
Net (loss) income	(38,441)
Ending balance (in shares) at Sep. 30, 2021			41,850,938		1,716,805
Ending balance at Sep. 30, 2021	252,220		$ 42		$ (4,427)		173,426	82,826	353
Beginning balance (in shares) at Mar. 31, 2021			41,719,329		1,666,342
Beginning balance at Mar. 31, 2021	285,602		$ 42		$ (4,274)		171,931	117,355	548
Increase (Decrease) in Stockholders' Equity
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent	44								44
Vesting of restricted stock (in shares)			162,253
APIC, Share-based Payment Arrangement, Restricted Stock Unit, Increase for Cost Recognition	574						574
APIC, Share-based Payment Arrangement, ESPP, Increase for Cost Recognition	7						7
Stock buy back (in shares)			(48,793)		48,793
Stock buy back	(148)				$ (148)
Net (loss) income	(27,267)							(27,267)
Ending balance (in shares) at Jun. 30, 2021			41,832,789		1,715,135
Ending balance at Jun. 30, 2021	258,812		$ 42		$ (4,422)		172,512	90,088	592
Increase (Decrease) in Stockholders' Equity
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent	(239)								(239)
Vesting of restricted stock (in shares)			4,875
APIC, Share-based Payment Arrangement, Restricted Stock Unit, Increase for Cost Recognition	879						879
APIC, Share-based Payment Arrangement, ESPP, Increase for Cost Recognition	10						10
Employee stock purchase plan issuance (in shares)			14,944
Stock Issued During Period, Value, Employee Stock Purchase Plan	25						25
Stock buy back (in shares)			1,670		(1,670)
Stock buy back	(5)				$ (5)
Net (loss) income	(7,262)							(7,262)
Ending balance (in shares) at Sep. 30, 2021			41,850,938		1,716,805
Ending balance at Sep. 30, 2021	$ 252,220		$ 42		$ (4,427)		$ 173,426	$ 82,826	$ 353