Condensed Consolidated Statements of Changes in Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Gain/(Loss), Net of Tax [Member]	Retained Earnings/(Accumulated Deficit) [Member] Cumulative Effect, Period of Adoption, Adjustment [Member]	Retained Earnings/(Accumulated Deficit) [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member]	Total
Balance at Dec. 31, 2019	$ 1	$ 200,800	$ (723)	$ (4,871)	$ (8)	$ 17,584	$ (8)	$ 212,791
Balance (in shares) at Dec. 31, 2019	12,105		15
Stock-based Compensation Expense		8,160						8,160
Treasury Stock Purchases for Restricted Stock Vests			$ (1,523)					(1,523)
Treasury Stock Purchases for Restricted Stock Vests (in shares)			43
Issuance of Common Shares upon Stock Option and ESPP Exercise		449						449
Issuance of Common Shares upon Stock Option and ESPP Exercise (in shares)	14
Issuance of Restricted Stock Awards (in shares)	261
(Losses)/gains on interest rate swap				(9,178)				(9,178)
Net Loss						(19,347)		(19,347)
Balance at Jun. 30, 2020	$ 1	209,409	$ (2,246)	(14,049)		(1,771)		191,344
Balance (in shares) at Jun. 30, 2020	12,380		58
Balance at Mar. 31, 2020	$ 1	203,505	$ (1,211)	(11,689)		10,565		201,171
Balance (in shares) at Mar. 31, 2020	12,112		28
Stock-based Compensation Expense		5,736						5,736
Treasury Stock Purchases for Restricted Stock Vests			$ (1,035)					(1,035)
Treasury Stock Purchases for Restricted Stock Vests (in shares)			30
Issuance of Common Shares upon Stock Option and ESPP Exercise		168						168
Issuance of Common Shares upon Stock Option and ESPP Exercise (in shares)	7
Issuance of Restricted Stock Awards (in shares)	261
(Losses)/gains on interest rate swap				(2,360)				(2,360)
Net Loss						(12,336)		(12,336)
Balance at Jun. 30, 2020	$ 1	209,409	$ (2,246)	(14,049)		(1,771)		191,344
Balance (in shares) at Jun. 30, 2020	12,380		58
Balance at Dec. 31, 2020	$ 1	214,354	$ (2,246)	(11,437)		(4,972)		195,700
Balance (in shares) at Dec. 31, 2020	12,430		76
Stock-based Compensation Expense		4,713						4,713
Treasury Stock Purchases for Restricted Stock Vests			$ (816)					(816)
Treasury Stock Purchases for Restricted Stock Vests (in shares)			25
Issuance of Common Shares upon Stock Option and ESPP Exercise		337						337
Issuance of Common Shares upon Stock Option and ESPP Exercise (in shares)	12
Issuance of Restricted Stock Awards (in shares)	457
Restricted Stock Awards Forfeitures		(1)						(1)
Restricted Stock Awards Forfeitures (in shares)	(73)		(21)
(Losses)/gains on interest rate swap				6,004				6,004
Net Loss						(14,020)		(14,020)
Balance at Jun. 30, 2021	$ 1	219,403	$ (3,062)	(5,433)		(18,992)		191,917
Balance (in shares) at Jun. 30, 2021	12,826		80
Balance at Mar. 31, 2021	$ 1	216,223	$ (2,594)	(5,032)		(4,886)		203,712
Balance (in shares) at Mar. 31, 2021	12,830		86
Stock-based Compensation Expense		2,844						2,844
Treasury Stock Purchases for Restricted Stock Vests			$ (468)					(468)
Treasury Stock Purchases for Restricted Stock Vests (in shares)			15
Issuance of Common Shares upon Stock Option and ESPP Exercise		337						337
Issuance of Common Shares upon Stock Option and ESPP Exercise (in shares)	12
Issuance of Restricted Stock Awards (in shares)	19
Restricted Stock Awards Forfeitures		(1)						(1)
Restricted Stock Awards Forfeitures (in shares)	(35)		(21)
(Losses)/gains on interest rate swap				(401)				(401)
Net Loss						(14,106)		(14,106)
Balance at Jun. 30, 2021	$ 1	$ 219,403	$ (3,062)	$ (5,433)		$ (18,992)		$ 191,917
Balance (in shares) at Jun. 30, 2021	12,826		80