Consolidated Statements of Changes in Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Common Stock [Member]	Treasury Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Balance (in shares) at Dec. 31, 2018	76,525,581	1,233,198
Balance at Dec. 31, 2018	$ 38	$ (3,272)	$ 395,769	$ (185,369)	$ 207,166
Vesting of restricted stock units and issuance of restricted stock (in shares)	2,048,901
Vesting of restricted stock units and issuance of restricted stock	$ 1		(1)		0
Increase in treasury stock resulting from shares withheld to cover statutory taxes (in shares)		557,988
Increase in treasury stock resulting from shares withheld to cover statutory taxes		$ (3,096)			(3,096)
Share-based compensation			8,086		8,086
Net income (loss)				(2,703)	(2,703)
Balance (in shares) at Sep. 30, 2019	78,574,482	1,791,186
Balance at Sep. 30, 2019	$ 39	$ (6,368)	403,854	(188,072)	209,453
Balance (in shares) at Jun. 30, 2019	78,534,774	1,785,489
Balance at Jun. 30, 2019	$ 39	$ (6,351)	402,192	(183,609)	212,271
Vesting of restricted stock units and issuance of restricted stock (in shares)	39,708
Vesting of restricted stock units and issuance of restricted stock					0
Increase in treasury stock resulting from shares withheld to cover statutory taxes (in shares)		5,697
Increase in treasury stock resulting from shares withheld to cover statutory taxes		$ (17)			(17)
Share-based compensation			2,812		2,812
Net income (loss)				(4,463)	(4,463)
Reclassification of exercisable warrants from liability to equity			(1,150)		(1,150)
Balance (in shares) at Sep. 30, 2019	78,574,482	1,791,186
Balance at Sep. 30, 2019	$ 39	$ (6,368)	403,854	(188,072)	209,453
Balance (in shares) at Dec. 31, 2019	78,642,078	2,768,399
Balance at Dec. 31, 2019	$ 39	$ (8,184)	406,198	(187,116)	210,937
Vesting of restricted stock units and issuance of restricted stock (in shares)	1,618,397	0
Vesting of restricted stock units and issuance of restricted stock	$ 1	$ 0	(1)	0	$ 0
Increase in treasury stock resulting from shares withheld to cover statutory taxes (in shares)	0	210,683			210,683
Increase in treasury stock resulting from shares withheld to cover statutory taxes	$ 0	$ (490)	0	0	$ (490)
Exercise of warrants by certain warrant holders (see note 7) (in shares)	0	300,000
Share-based compensation	$ 0	$ 0	4,968	0	4,968
Net income (loss)	$ 0	$ 0	0	2,029	2,029
Repurchase of shares into treasury stock (in shares)	0	657,673
Repurchase of shares into treasury stock	$ 0	$ (1,300)	0	0	(1,300)
Balance (in shares) at Sep. 30, 2020	80,260,475	3,936,755
Balance at Sep. 30, 2020	$ 40	$ (9,974)	411,165	(185,087)	216,144
Balance (in shares) at Jun. 30, 2020	79,908,985	3,616,398
Balance at Jun. 30, 2020	$ 40	$ (9,930)	409,961	(186,256)	213,815
Vesting of restricted stock units and issuance of restricted stock (in shares)	51,490	0
Vesting of restricted stock units and issuance of restricted stock	$ 0	$ 0	0	0	0
Increase in treasury stock resulting from shares withheld to cover statutory taxes (in shares)	0	20,357
Increase in treasury stock resulting from shares withheld to cover statutory taxes	$ 0	$ (44)	0	0	(44)
Exercise of warrants by certain warrant holders (see note 7) (in shares)	300,000	300,000
Share-based compensation	$ 0	$ 0	1,204	0	1,204
Net income (loss)	$ 0	$ 0	0	1,169	1,169
Balance (in shares) at Sep. 30, 2020	80,260,475	3,936,755
Balance at Sep. 30, 2020	$ 40	$ (9,974)	$ 411,165	$ (185,087)	$ 216,144