Consolidated Statements of Changes in Stockholders' Equity - USD ($)	Total	Common Stock	Additional Paid In Capital	Accumulated Other Comprehensive Income	Accumulated Deficit
Balance at beginning of period (in shares) at Jun. 30, 2014		31,084,742
Balance at beginning of period at Jun. 30, 2014	$ 152,055,000	$ 31,000	$ 390,589,000	$ 0	$ (238,565,000)
Stock-based compensation related to restricted stock awards, net (in shares)		469,575
Stock-based compensation related to restricted stock awards, net	14,089,000	$ 1,000	14,088,000
Exercise of stock options and warrants (in shares)		222,937
Exercise of stock options and warrants	2,152,000	$ 0	2,152,000
Employee stock purchase plan activity (in shares)		120,870
Employee stock purchase plan activity	3,871,000		3,871,000
Unrealized gain on marketable securities	90,000	$ 0	0	90,000	0
Net gain reclassified from accumulated other comprehensive income	0
Net loss	(32,822,000)				(32,822,000)
Balance at end of period (in shares) at Jun. 30, 2015		31,898,124
Balance at end of period at Jun. 30, 2015	139,435,000	$ 32,000	410,700,000	90,000	(271,387,000)
Stock-based compensation related to restricted stock awards, net (in shares)		557,756
Stock-based compensation related to restricted stock awards, net	11,986,000	$ 1,000	11,985,000
Exercise of stock options and warrants (in shares)		87,817
Exercise of stock options and warrants	1,006,000		1,006,000
Employee stock purchase plan activity (in shares)		248,800
Employee stock purchase plan activity	4,544,000		4,544,000
Unrealized gain on marketable securities	20,000			20,000
Net gain reclassified from accumulated other comprehensive income	(70,000)			(70,000)
Net loss	(56,024,000)				(56,024,000)
Balance at end of period (in shares) at Jun. 30, 2016		32,792,497
Balance at end of period at Jun. 30, 2016	100,897,000	$ 33,000	428,235,000	40,000	(327,411,000)
Stock-based compensation related to restricted stock awards, net (in shares)		(635,018)
Stock-based compensation related to restricted stock awards, net	9,412,000	$ 0	9,412,000
Exercise of stock options and warrants (in shares)		515,164
Exercise of stock options and warrants	5,262,000		5,362,000		(100,000)
Employee stock purchase plan activity (in shares)		176,920
Employee stock purchase plan activity	4,550,000		4,550,000
Unrealized gain on marketable securities	66,000			66,000
Net gain reclassified from accumulated other comprehensive income	(6,000)			(6,000)
Net loss	(1,792,000)				(1,792,000)
Balance at end of period (in shares) at Jun. 30, 2017		32,849,563
Balance at end of period at Jun. 30, 2017	$ 118,389,000	$ 33,000	$ 447,559,000	$ 100,000	$ (329,303,000)