CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Treasury Stock	Total
Balance, beginning at Jun. 30, 2018	$ 38	$ 306,817	$ 306,464	$ (515)	$ (13,889)	$ 598,915
Balance, beginning (in shares) at Jun. 30, 2018	38,257
Increase (Decrease) in Shareholders' Equity
Shares issued in connection with share-based compensation plans	$ 1	800				801
Shares issued in connection with share-based compensation plans (in shares)	601
Share-based compensation		6,974				6,974
Purchase of treasury stock					(531)	(531)
Other comprehensive loss, net of income tax				56		56
ASC 606 adjustment, net of tax			(2,282)			(2,282)
Net income (loss)			(264,521)			(264,521)
Balance, ending at Mar. 31, 2019	$ 39	314,591	39,661	(571)	(14,420)	339,300
Balance, ending (in shares) at Mar. 31, 2019	38,858
Balance, beginning at Dec. 31, 2018	$ 39	312,322	29,016	(502)	(14,364)	326,511
Balance, beginning (in shares) at Dec. 31, 2018	38,767
Increase (Decrease) in Shareholders' Equity
Shares issued in connection with share-based compensation plans		280				280
Shares issued in connection with share-based compensation plans (in shares)	91
Share-based compensation		1,989				1,989
Purchase of treasury stock					(56)	(56)
Other comprehensive loss, net of income tax				69		69
Net income (loss)			10,645			10,645
Balance, ending at Mar. 31, 2019	$ 39	314,591	39,661	(571)	(14,420)	339,300
Balance, ending (in shares) at Mar. 31, 2019	38,858
Balance, beginning at Jun. 30, 2019	$ 39	317,023	32,075	(615)	(14,481)	334,041
Balance, beginning (in shares) at Jun. 30, 2019	38,970
Increase (Decrease) in Shareholders' Equity
Shares issued in connection with share-based compensation plans	$ 1	777				778
Shares issued in connection with share-based compensation plans (in shares)	929
Share-based compensation		8,336				8,336
Purchase of treasury stock					(1,854)	(1,854)
Other comprehensive loss, net of income tax				26		26
Purchase of capped call		(7,072)				(7,072)
Net income (loss)			(23,665)			(23,665)
Balance, ending at Mar. 31, 2020	$ 40	319,064	8,410	(641)	(16,335)	310,538
Balance, ending (in shares) at Mar. 31, 2020	39,899
Balance, beginning at Dec. 31, 2019	$ 40	317,012	25,002	(578)	(16,304)	325,172
Balance, beginning (in shares) at Dec. 31, 2019	39,852
Increase (Decrease) in Shareholders' Equity
Shares issued in connection with share-based compensation plans		182				182
Shares issued in connection with share-based compensation plans (in shares)	47
Share-based compensation		1,870				1,870
Purchase of treasury stock					(31)	(31)
Other comprehensive loss, net of income tax				63		63
Net income (loss)			(16,592)			(16,592)
Balance, ending at Mar. 31, 2020	$ 40	$ 319,064	$ 8,410	$ (641)	$ (16,335)	$ 310,538
Balance, ending (in shares) at Mar. 31, 2020	39,899