Unaudited Condensed Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income / (Loss)	Accumulated Deficit
Balance at Jun. 30, 2019	$ 49,871	$ 89	$ 535,332	$ (10)	$ (485,540)
Balance (in shares) at Jun. 30, 2019		88,521,511
Issuance of restricted stock	(207)		(207)
Issuance of restricted stock (in shares)		356,999
Share-based compensation	1,684		1,684
Net income (loss)	(9,356)				(9,356)
Cumulative translation adjustment	(1,018)			(1,018)
Balance at Sep. 30, 2019	40,974	$ 89	536,809	(1,028)	(494,896)
Balance (in shares) at Sep. 30, 2019		88,878,510
Balance at Jun. 30, 2019	49,871	$ 89	535,332	(10)	(485,540)
Balance (in shares) at Jun. 30, 2019		88,521,511
Net income (loss)	1,354
Cumulative translation adjustment	(141)
Balance at Dec. 31, 2019	56,000	$ 90	540,247	(151)	(484,186)
Balance (in shares) at Dec. 31, 2019		90,331,453
Balance at Sep. 30, 2019	40,974	$ 89	536,809	(1,028)	(494,896)
Balance (in shares) at Sep. 30, 2019		88,878,510
Issuance of restricted stock	1	$ 1
Issuance of restricted stock (in shares)		987,765
Issuance of common stock under employee stock purchase plan	1,357		1,357
Issuance of common stock under employee stock purchase plan (in shares)		523,714
Share-based compensation	2,081		2,081
Tax withholding upon vesting of restricted stock units (in shares)		(58,536)
Net income (loss)	10,710				10,710
Cumulative translation adjustment	877			877
Balance at Dec. 31, 2019	56,000	$ 90	540,247	(151)	(484,186)
Balance (in shares) at Dec. 31, 2019		90,331,453
Balance at Jun. 30, 2020	$ 63,635	$ 91	545,741	(484)	(481,713)
Balance (in shares) at Jun. 30, 2020	91,178,108	91,178,108
Issuance of restricted stock (in shares)		95,575
Share-based compensation	$ 1,910		1,910
Net income (loss)	402				402
Cumulative translation adjustment	1,493			1,493
Balance at Sep. 30, 2020	67,440	$ 91	547,651	1,009	(481,311)
Balance (in shares) at Sep. 30, 2020		91,273,683
Balance at Jun. 30, 2020	$ 63,635	$ 91	545,741	(484)	(481,713)
Balance (in shares) at Jun. 30, 2020	91,178,108	91,178,108
Net income (loss)	$ 5,171
Cumulative translation adjustment	3,302
Balance at Dec. 31, 2020	$ 77,778	$ 92	551,410	2,818	(476,542)
Balance (in shares) at Dec. 31, 2020	92,989,337	92,989,337
Balance at Sep. 30, 2020	$ 67,440	$ 91	547,651	1,009	(481,311)
Balance (in shares) at Sep. 30, 2020		91,273,683
Exercise of stock options, net	66		66
Exercise of Stock options, net (in shares)		17,175
Issuance of restricted stock	(343)		(343)
Issuance of restricted stock (in shares)		1,117,816
Issuance of common stock under employee stock purchase plan	1,042	$ 1	1,041
Issuance of common stock under employee stock purchase plan (in shares)		580,663
Share-based compensation	2,995		2,995
Net income (loss)	4,769				4,769
Cumulative translation adjustment	1,809			1,809
Balance at Dec. 31, 2020	$ 77,778	$ 92	$ 551,410	$ 2,818	$ (476,542)
Balance (in shares) at Dec. 31, 2020	92,989,337	92,989,337