Condensed Consolidated Statements of Cash Flows - USD ($)	9 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Cash flows from operating activities:
Net loss	$ (43,210,337)	$ (35,696,562)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation	504,780	408,643
Amortization of deferred revenue	(5,975)	(9,399)
Amortization of bond premiums	538,200	307,227
Amortization of debt issuance costs	547,366	99,337
Amortization of deferred rent	74,637	74,637
Gain on sale of marketable securities	(1,844)	(10,203)
Increase (decrease) in allowance for doubtful accounts	31,077	(20,752)
Non-cash expense related to stock compensation	2,840,560	2,117,582
Non-cash decrease in value of life insurance policy	20,566	53,705
Changes in operating assets and liabilities	2,742,797	2,296,242
Net cash used in operating activities	(35,918,173)	(30,379,543)
Cash flows from investing activities:
Purchases of marketable securities	(2,749,117)	(82,298,796)
Proceeds from sales/maturities of marketable securities	38,020,088	26,748,771
Purchases of property and equipment	(1,430,759)	(581,528)
Net cash provided by (used in) investing activities	33,840,212	(56,131,553)
Cash flows from financing activities:
Proceeds from issuance of convertible senior notes		100,000,000
Payment of debt issuance costs		(3,657,214)
Exercise of stock options	158,079	505,011
Tax withholding payments for stock compensation	(317,390)	(518,995)
Net cash (used in) provided by financing activities	(159,311)	96,328,802
Effect of changes in exchange rates on cash and cash equivalents	(6,194)	(716,041)
Net (decrease) increase in cash and cash equivalents	(2,243,466)	9,101,665
Cash and cash equivalents beginning of period	13,452,775	6,961,494
Cash and cash equivalents end of period	11,209,309	$ 16,063,159
Supplemental disclosure of cash flow information:
Interest paid	$ 4,802,778