Condensed Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014
Cash flows from operating activities:
Net loss	$ (59,135,716)	$ (48,123,971)	$ (35,531,178)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	737,661	578,066	569,442
Amortization of deferred revenue	(202,088)	(5,712)	(2,674,347)
Amortization of bond premiums	669,858	544,208	228,211
Amortization of debt issuance costs	729,821	281,791
Amortization of deferred rent	99,516	99,516	99,516
Gain on sale of marketable securities	(1,844)	(11,015)	(7,517)
Increase (decrease) in allowance for doubtful accounts	20,369	(34,432)	39,344
Non-cash expense related to stock compensation	3,740,526	2,788,677	3,218,050
Non-cash decrease in value of life insurance policy	20,566	155,544	18,722
Changes in operating assets and liabilities:
Accounts receivable	(190,300)	271,820	(62,652)
Inventory	256,381	328,126	204,386
Other receivables	620,300	(553,966)	(130,634)
Prepaid expenses	97,948	478,794	(1,182,237)
Other current assets	761,803	(776,975)	1,450,494
Accounts payable and accrued expenses	3,147,606	4,946,099	2,935,816
Deferred revenues	165,793	37,221	134,196
Net cash used in operating activities	(48,461,800)	(38,996,209)	(30,690,388)
Cash flows from investing activities:
Purchases of marketable securities	(2,749,117)	(86,307,071)	(44,116,046)
Proceeds from sales/maturities of marketable securities	50,850,088	34,491,153	9,024,145
Purchases of property and equipment	(2,226,256)	(924,429)	(378,006)
Proceeds from partial liquidation of life insurance policy			400,000
Net cash provided by (used in) investing activities	45,874,715	(52,740,347)	(35,069,907)
Cash flows from financing activities:
Proceeds from issuance of convertible senior notes		100,000,000
Payment of debt issuance costs		(3,657,215)
Issuance of common stock, net of fees			29,809,448
Exercise of stock options	2,732,962	2,959,930	1,799,353
Tax withholding payments for stock compensation	(368,984)	(585,725)	(331,732)
Net cash provided by financing activities	2,363,978	98,716,990	31,277,069
Effect of changes in exchange rates on cash and cash equivalents	(26,043)	(489,153)	118,720
Net (decrease) increase in cash and cash equivalents	(249,150)	6,491,281	(34,364,506)
Cash and cash equivalents beginning of period	13,452,775	6,961,494	41,326,000
Cash and cash equivalents end of period	13,203,625	13,452,775	6,961,494
Supplemental disclosure of cash flow information:
Interest paid	4,802,778
Cash paid for income taxes	$ 28,679	$ 75,598	$ 136,973