Consolidated Statements Shareholders Equity - USD ($)	Preferred Stock	Common Stock	Additional Paid-In Capital	Comprehensive Loss	Accumulated Deficit	Total
Stockholders' equity (deficit) - beginning at Jun. 30, 2015	$ 47	$ 571,284	$ 303,332,460	$ 0	$ (291,699,316)	$ 12,204,475
Preferred stock, shares - beginning at Jun. 30, 2015	4,697					4,697
Common stock, shares - beginning at Jun. 30, 2015		57,128,433				57,128,433
Sale of common stock units, net of costs			19,834,278			$ 19,834,278
Issuance of warrants on debt			305,196			305,196
Warrant exercises		$ 108,909	(108,909)
Warrant exercises, shares		10,890,889
Stock-based compensation		$ 6,622	1,836,743			1,843,365
Stock-based compensation, shares		662,186
Series A Conversion	$ (7)	$ 100	(93)
Series A Conversion, shares	(667)	10,030
Withholding taxes related to restricted stock units		$ (1,235)	(57,166)			(58,401)
Withholding taxes related to restricted stock units, shares		(123,483)
Unrealized gains (loss) on investments				(1,944)		(1,944)
Net income (loss)	$ 0	$ 0	0	0	(51,712,936)	(51,712,936)
Stockholders' equity (deficit) - ending at Jun. 30, 2016	$ 40	$ 685,680	325,142,509	(1,944)	(343,412,252)	$ (17,585,967)
Preferred stock, shares outstanding at Jun. 30, 2016	4,030					4,030
Common stock, shares - ending at Jun. 30, 2016		68,568,055				68,568,055
Sale of common stock units, net of costs		$ 368,661	23,488,312			$ 23,856,973
Sale of common stock units, net of costs, shares		36,866,097
Warrant exercises		$ 545,778	(381,420)			164,358
Warrant exercises, shares		54,577,802
Stock-based compensation		$ 5,794	1,751,465			1,757,259
Stock-based compensation, shares		579,400
Withholding taxes related to restricted stock units		$ (760)	(26,328)			(27,088)
Withholding taxes related to restricted stock units, shares		(75,993)
Unrealized gains (loss) on investments				1,354		1,354
Net income (loss)					(13,331,533)	(13,331,533)
Stockholders' equity (deficit) - ending at Jun. 30, 2017	$ 40	$ 1,605,153	349,974,538	(590)	(356,743,785)	$ (5,164,644)
Preferred stock, shares outstanding at Jun. 30, 2017	4,030					4,030
Common stock, shares - ending at Jun. 30, 2017		160,515,361				160,515,361
Sale of common stock units, net of costs		$ 12,838	1,244,936			$ 1,257,774
Sale of common stock units, net of costs, shares		1,283,754
Warrant exercises		$ 377,786	2,133,243			$ 2,511,029
Warrant exercises, shares		37,778,614				(208,900)
Option exercises		$ 2,089	157,792			$ 159,881
Option exercises, shares		208,900
Stock-based compensation		$ 7,676	3,515,510		(4,835)	3,518,351
Stock-based compensation, shares		767,576
Payment of witholding taxes related to restricted stock units			(20,786)			(20,786)
Unrealized gains (loss) on investments				590		590
Net income (loss)					24,702,714	24,702,714
Stockholders' equity (deficit) - ending at Jun. 30, 2018	$ 40	$ 2,005,542	$ 357,005,233	$ 0	$ (332,327,906)	$ 26,964,909
Preferred stock, shares outstanding at Jun. 30, 2018	4,030					4,030
Common stock, shares - ending at Jun. 30, 2018		200,554,205				200,554,205