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, 2015		31,898,124
Balance at beginning 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	$ 0	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	$ 0	0	20,000	0
Net gain reclassified from accumulated other comprehensive income	(70,000)
Net income (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 income (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)
Stock-based compensation related to restricted stock awards, net (in shares)		295,650
Stock-based compensation related to restricted stock awards, net	9,546,000	$ 0	9,546,000
Exercise of stock options and warrants (in shares)		55,880
Exercise of stock options and warrants	514,000		514,000		0
Employee stock purchase plan activity (in shares)		158,939
Employee stock purchase plan activity	4,308,000		4,308,000
Unrealized gain on marketable securities	35,000			35,000
Net gain reclassified from accumulated other comprehensive income	(34,000)			(34,000)
Net income (loss)	1,712,000				1,712,000
Balance at end of period (in shares) at Jun. 30, 2018		33,360,032
Balance at end of period at Jun. 30, 2018	$ 134,470,000	$ 33,000	$ 461,927,000	$ 101,000	$ (327,591,000)