Consolidated Statements of Stockholders' Equity - USD ($)	Preferred Stock	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit	Total
Beginning balance, shares at Jun. 30, 2017	4,030	160,515,361
Beginning balance at Jun. 30, 2017	$ 40	$ 1,605,153	$ 349,974,538	$ (590)	$ (356,743,785)	$ (5,164,644)
Cumulative effect of accounting change			4,835		(4,835)
Stock-based compensation, shares		150,229
Stock-based compensation		$ 1,503	2,369,469			2,370,972
Warrant exercises, shares		34,782,807
Warrant exercises		$ 347,828	(233,444)			114,384
Option exercises, shares		56,400
Option exercises		$ 564	30,667			31,231
Unrealized gains on investments				590		590
Withholding taxes related to restricted stock units, shares		(27,465)
Withholding taxes related to restricted stock units		$ (275)	(20,511)			(20,786)
Net (loss) income					12,894,640	12,894,640
Ending balance, shares at Mar. 31, 2018	4,030	195,477,332
Ending balance at Mar. 31, 2018	$ 40	$ 1,954,773	352,125,554	0	(343,853,980)	10,226,387
Beginning balance, shares at Dec. 31, 2017	4,030	195,373,239
Beginning balance at Dec. 31, 2017	$ 40	$ 1,953,732	350,787,078	0	(343,114,797)	9,626,053
Stock-based compensation, shares		75,158
Stock-based compensation		$ 752	1,328,320			1,329,072
Option exercises, shares		56,400
Option exercises		$ 564	30,667			31,231
Withholding taxes related to restricted stock units, shares		(27,465)
Withholding taxes related to restricted stock units		$ (275)	(20,511)			(20,786)
Net (loss) income					(739,183)	(739,183)
Ending balance, shares at Mar. 31, 2018	4,030	195,477,332
Ending balance at Mar. 31, 2018	$ 40	$ 1,954,773	352,125,554	0	(343,853,980)	10,226,387
Beginning balance, shares at Jun. 30, 2018	4,030	200,554,205
Beginning balance at Jun. 30, 2018	$ 40	$ 2,005,542	357,005,233	0	(332,045,906)	26,964,909
Cumulative effect of accounting change					500,000	500,000
Stock-based compensation, shares		319,817
Stock-based compensation		$ 3,198	2,863,581			2,866,779
Sale of common stock , net of costs, shares		2,256,445
Sale of common stock , net of costs		$ 22,564	2,230,244			2,252,808
Withholding taxes related to restricted stock units, shares		(67,038)
Withholding taxes related to restricted stock units		$ (670)	(65,322)			(65,992)
Net (loss) income					(16,451,536)	(16,451,536)
Ending balance, shares at Mar. 31, 2019	4,030	203,063,429
Ending balance at Mar. 31, 2019	$ 40	$ 2,030,634	362,033,736	0	(347,997,442)	16,066,968
Beginning balance, shares at Dec. 31, 2018	4,030	203,063,429
Beginning balance at Dec. 31, 2018	$ 40	$ 2,030,634	361,379,336	0	(342,270,312)	21,139,698
Stock-based compensation			654,400			654,400
Net (loss) income					(5,727,130)	(5,727,130)
Ending balance, shares at Mar. 31, 2019	4,030	203,063,429
Ending balance at Mar. 31, 2019	$ 40	$ 2,030,634	$ 362,033,736	$ 0	$ (347,997,442)	$ 16,066,968