Condensed Consolidated Statements of Cash Flows - USD ($)	6 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Cash flows from operating activities:
Net loss	$ (29,188,661)	$ (23,908,412)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation	336,127	281,634
Amortization of deferred revenue	(2,152)	(11,688)
Amortization of bond premiums	381,107	233,440
Amortization of debt issuance costs	364,911
Amortization of deferred rent	49,758	49,758
Gain from the sales of marketable securities	(1,844)	(9,898)
Increase (decrease) in allowance for doubtful accounts	13,298	(20,752)
Non-cash expense related to stock compensation	1,965,816	1,515,129
Changes in operating assets and liabilities	4,258,184	2,296,480
Net cash used in operating activities	(21,823,456)	(19,574,309)
Cash flows from investing activities:
Purchases of marketable securities	(2,749,117)	(3,244,370)
Proceeds from sales/maturities of marketable securities	26,128,088	19,478,097
Purchases of property and equipment	(1,230,726)	(439,599)
Net cash provided by investing activities	22,148,245	15,794,128
Cash flows from financing activities:
Exercise of stock options	158,079	80,959
Tax withholding payments for stock compensation	(185,499)	(221,291)
Net cash used in financing activities	(27,420)	(140,332)
Effect of changes in exchange rates on cash and cash equivalents	(33,937)	(192,291)
Net increase (decrease) in cash and cash equivalents	263,432	(4,112,804)
Cash and cash equivalents beginning of period	13,452,775	6,961,494
Cash and cash equivalents end of period	13,716,207	$ 2,848,690
Supplemental disclosure of cash flow information:
Interest paid	$ 2,427,778