Accumulated Other Comprehensive (Loss) Income - (Details) - USD ($)	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Accumulated Other Comprehensive (Loss) Income [Line Items]
Beginning balance	$ (57,526,967)	$ (4,524,621)	$ 38,859,398
Beginning, Balance	(132,226)
Net other comprehensive (loss) income for the year	(170,484)	28,866	(422,929)
Ending balance	(59,463,248)	(57,526,967)	(4,524,621)
Ending, Balance	(302,710)	(132,226)
Currency Translation Adjustments [Member]
Accumulated Other Comprehensive (Loss) Income [Line Items]
Beginning, Balance	(172,000)	(173,000)	262,000
Other comprehensive (loss) income before reclassifications	(62,000)	1,000	(435,000)
Net other comprehensive (loss) income for the year	(62,000)	1,000	(435,000)
Ending, Balance	(234,000)	(172,000)	(173,000)
Net Unrealized Gains (Losses) on Available-for-Sale Securities [Member]
Accumulated Other Comprehensive (Loss) Income [Line Items]
Beginning, Balance	40,000	12,000
Other comprehensive (loss) income before reclassifications	(125,000)	30,000	23,000
Amounts reclassified from accumulated other comprehensive income (loss)	16,000	(2,000)	(11,000)
Net other comprehensive (loss) income for the year	(109,000)	28,000	12,000
Ending, Balance	(69,000)	40,000	12,000
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive (Loss) Income [Line Items]
Beginning balance	(132,226)	(161,092)	261,837
Other comprehensive (loss) income before reclassifications	(187,000)	31,000	(412,000)
Amounts reclassified from accumulated other comprehensive income (loss)	16,000	(2,000)	(11,000)
Net other comprehensive (loss) income for the year	(170,484)	28,866	(422,929)
Ending balance	$ (302,710)	$ (132,226)	$ (161,092)