Income Taxes - Reconciliation of Statutory Tax Rates and Effective Tax Rates (Details)	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Income Tax Disclosure [Abstract]
Statutory rate	(34.00%)	(34.00%)	(34.00%)
Foreign income tax			0.10%
Change in valuation allowance	21.90%	30.40%	34.70%
State income taxes, (net of federal tax benefit)	(4.80%)	(2.80%)
Permanent differences, (primarily warrant-related expenses)	15.30%
Other	1.60%	(1.60%)	(0.70%)
Effective rate		(8.00%)	0.10%