Income Taxes (Details 3) - USD ($)	Jun. 30, 2018	Jun. 30, 2017
Deferred tax assets:
Net operating loss and credit carryforwards	$ 16,282,000	$ 29,014,000
Stock-based compensation	710,000	943,000
R&D and other credits	1,899,000	1,983,000
Capitalized R&D expenses	373,000	562,000
Inventory	143,000	243,000
Accrued expenses and other	83,000	407,091
Gross deferred tax assets	19,490,000	33,152,091
Valuation allowance for deferred tax assets	(16,123,000)	(27,886,000)
Total deferred tax assets	3,367,000	5,266,091
Deferred tax liabilities:
Depreciation and other	(563,000)	(1,187,440)
Intangible assets	(2,180,000)	(3,976,000)
Total deferred tax liabilities	(2,743,000)	(5,163,440)
Net deferred tax asset	$ 624,000	$ 102,651