UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock	Additional Paid-in Capital Cumulative Effect, Period of Adoption, Adjustment	Additional Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment	Retained Earnings	Treasury Stock	Cumulative Effect, Period of Adoption, Adjustment	Total
Balance at Jun. 30, 2020	$ 4		$ 730,761	$ 93	$ (6,253)	$ 46,953	$ (102,482)	$ (6,253)	$ 675,329
Balance (in shares) at Jun. 30, 2020	46,341,627						(5,334,743)
Increase (Decrease) in Stockholders' Equity
Net income (loss)						12,666			12,666
Foreign currency translation adjustment				(192)					(192)
Stock-based compensation expense			9,009						9,009
Exercise of stock options			32						32
Exercise of stock options (in shares)	948,867
Withholding of stock options for tax withholding			(10,885)						(10,885)
Withholding of stock options for tax withholding (in shares)	(655,219)
Equity component of convertible senior notes, net of issuance costs and taxes			105,477						105,477
Purchases of capped calls in connection with convertible senior notes			(60,354)						(60,354)
Issuance of restricted stock awards (in shares)	383,223
Forfeiture of restricted stock awards (in shares)	(9,329)
Repurchase of restricted stock for tax withholding			(5,808)						(5,808)
Repurchase of restricted stock for tax withholding (in shares)	(136,194)
Balance at Sep. 30, 2020	$ 4		768,232	(99)		53,366	$ (102,482)		719,021
Balance (in shares) at Sep. 30, 2020	46,872,975						(5,334,743)
Balance at Jun. 30, 2020	$ 4		730,761	93	(6,253)	46,953	$ (102,482)	(6,253)	675,329
Balance (in shares) at Jun. 30, 2020	46,341,627						(5,334,743)
Increase (Decrease) in Stockholders' Equity
Net income (loss)									37,167
Balance at Dec. 31, 2020	$ 4		777,409	(369)		77,867	$ (102,482)		752,429
Balance (in shares) at Dec. 31, 2020	46,893,934						(5,334,743)
Balance at Sep. 30, 2020	$ 4		768,232	(99)		53,366	$ (102,482)		719,021
Balance (in shares) at Sep. 30, 2020	46,872,975						(5,334,743)
Increase (Decrease) in Stockholders' Equity
Net income (loss)						24,501			24,501
Foreign currency translation adjustment				(270)					(270)
Stock-based compensation expense			9,181						9,181
Exercise of stock options			271						271
Exercise of stock options (in shares)	15,000
Equity component of convertible senior notes, net of issuance costs and taxes			25						25
Issuance of restricted stock awards (in shares)	19,500
Forfeiture of restricted stock awards (in shares)	(2,122)
Repurchase of restricted stock for tax withholding			(300)						(300)
Repurchase of restricted stock for tax withholding (in shares)	(11,419)
Balance at Dec. 31, 2020	$ 4		777,409	(369)		77,867	$ (102,482)		752,429
Balance (in shares) at Dec. 31, 2020	46,893,934						(5,334,743)
Balance at Jun. 30, 2021	$ 4	$ (89,460)	795,449	(474)	8,181	112,151	$ (102,482)	(81,279)	804,648
Balance (in shares) at Jun. 30, 2021	46,911,527						(5,334,743)
Increase (Decrease) in Stockholders' Equity
Net income (loss)						(5,883)			(5,883)
Foreign currency translation adjustment				144					144
Stock-based compensation expense			8,050						8,050
Exercise of stock options			246						246
Exercise of stock options (in shares)	15,025
Issuance of restricted stock awards (in shares)	398,943
Forfeiture of restricted stock awards (in shares)	(34,740)
Repurchase of restricted stock for tax withholding			(6,020)						(6,020)
Repurchase of restricted stock for tax withholding (in shares)	(179,151)
Balance at Sep. 30, 2021	$ 4		708,265	(330)		114,449	$ (102,482)		719,906
Balance (in shares) at Sep. 30, 2021	47,111,604						(5,334,743)
Balance at Jun. 30, 2021	$ 4	$ (89,460)	795,449	(474)	$ 8,181	112,151	$ (102,482)	$ (81,279)	804,648
Balance (in shares) at Jun. 30, 2021	46,911,527						(5,334,743)
Increase (Decrease) in Stockholders' Equity
Net income (loss)									$ 36,121
Exercise of stock options (in shares)									15,025
Balance at Dec. 31, 2021	$ 4		680,601	(343)		156,453	$ (102,482)		$ 734,233
Balance (in shares) at Dec. 31, 2021	48,084,410						(5,334,743)
Balance at Sep. 30, 2021	$ 4		708,265	(330)		114,449	$ (102,482)		719,906
Balance (in shares) at Sep. 30, 2021	47,111,604						(5,334,743)
Increase (Decrease) in Stockholders' Equity
Net income (loss)						42,004			42,004
Foreign currency translation adjustment				(13)					(13)
Stock-based compensation expense			1,697						1,697
Vesting of performance share units, net of tax withholding (in shares)	1,012,374
Issuance of restricted stock awards (in shares)	27,750
Forfeiture of restricted stock awards (in shares)	(57,480)
Repurchase of restricted stock for tax withholding			(29,361)						(29,361)
Repurchase of restricted stock for tax withholding (in shares)	(9,838)
Balance at Dec. 31, 2021	$ 4		$ 680,601	$ (343)		$ 156,453	$ (102,482)		$ 734,233
Balance (in shares) at Dec. 31, 2021	48,084,410						(5,334,743)