Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Total	As Adjusted [Member]	Common Stock [Member]	Common Stock [Member] As Adjusted [Member]	Additional Paid-In Capital [Member]	Additional Paid-In Capital [Member] As Adjusted [Member]	Accumulated Other Comprehensive Income [Member]	Accumulated Other Comprehensive Income [Member] As Adjusted [Member]	Accumulated Deficit [Member]	Accumulated Deficit [Member] As Adjusted [Member]
Balance at Dec. 31, 2019	$ 337,412		$ 1,553		$ 352,658		$ 945		$ (17,744)
Balance, shares at Dec. 31, 2019			155,264,000
Restricted stock issued and vesting of restricted stock units, net			$ 14		(14)
Restricted stock issued and vesting of restricted stock units net, shares			1,438,000
Shares repurchased	(1,495)		$ (3)		(1,492)
Shares repurchased, shares			(385,000)
Exercise of stock options, net	240				240
Exercise of stock options net, shares			107,000
Stock-based compensation	3,239				3,239
Other comprehensive loss	(853)						(853)
Dividends	(5,136)				(5,136)
Net income	(8,638)								(8,638)
Balance at Mar. 31, 2020	324,769		$ 1,564		349,495		92		(26,382)
Balance, shares at Mar. 31, 2020			156,424,000
Balance at Dec. 31, 2020	$ 266,265	$ 263,199	$ 1,487	$ 1,487	317,075	$ 313,393	1,102	$ 1,102	(53,399)	$ (52,783)
Balance, shares at Dec. 31, 2020	148,716,000		148,716,000	148,716,000
Reclassification of equity component related to convertible notes, net of deferred taxes of $1,022, upon the implementation of ASU 2020-06 (Note 10)	$ (3,066)				(3,682)				616
Restricted stock issued and vesting of restricted stock units, net			$ 15		(15)
Restricted stock issued and vesting of restricted stock units net, shares			1,510,000
Shares repurchased	(2,630)		$ (5)		(2,625)
Shares repurchased, shares			(490,000)
Exercise of stock options, net	379		$ 1		378
Exercise of stock options net, shares			75,000
Stock-based compensation	3,143				3,143
Other comprehensive loss	(117)						(117)
Dividends	(4,937)								(4,937)
Net income	15,147								15,147
Balance at Mar. 31, 2021	$ 274,184		$ 1,498		$ 314,274		$ 985		$ (42,573)
Balance, shares at Mar. 31, 2021	149,811,000		149,811,000