Condensed Consolidated Statements of Cash Flows - USD ($)	3 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Cash flows from operating activities:
Net loss	$ (16,228,893)	$ (15,416,039)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	225,862	167,865
Amortization of deferred revenue	(15,107)	(10,825)
Amortization of bond premiums	94,380	205,756
Amortization of debt issuance costs	182,454	182,455
Amortization of deferred rent	24,879	24,879
Gain (loss) on sale of marketable securities	15,040	(1,844)
(Decrease) increase in allowance for doubtful accounts	(10,590)	17,447
Non-cash expense related to stock compensation	774,042	896,687
Changes in operating assets and liabilities	(1,870,432)	584,152
Net cash used in operating activities	(16,808,365)	(13,349,467)
Cash flows from investing activities:
Proceeds from sales/maturities of marketable securities	12,712,000	14,292,088
Purchases of marketable securities		(2,000,000)
Purchases of property and equipment	(647,572)	(689,941)
Net cash provided by investing activities	12,064,428	11,602,147
Cash flows from financing activities:
Exercise of stock options	105,133	142,179
Tax withholding payments for stock compensation	(105,229)	(83,479)
Net cash (used in) provided by financing activities	(96)	58,700
Effect of changes in exchange rates on cash and cash equivalents	5,015	20,919
Net decrease in cash and cash equivalents	(4,739,018)	(1,667,701)
Cash and cash equivalents beginning of period	13,203,625	13,452,775
Cash and cash equivalents end of period	8,464,607	11,785,074
Supplemental disclosure of cash flow information:
Interest paid	$ 2,375,000	$ 2,427,778