Accumulated Other Comprehensive (Loss) Income - (Details) - USD ($)	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
AOCI Attributable to Parent [Roll Forward]
Beginning balance	$ (59,463,248)	$ (57,526,967)	$ (4,524,621)
Other comprehensive (loss) income before reclassifications	(50,000)	(187,000)	31,000
Amounts reclassified from accumulated other comprehensive income (loss)	0	16,000	(2,000)
Other comprehensive income (loss), net of tax:	(50,088)	(170,484)	28,866
Net other comprehensive loss for the year		(171,000)
Ending balance	399,685,666	(59,463,248)	(57,526,967)
Currency Translation Adjustments [Member]
AOCI Attributable to Parent [Roll Forward]
Beginning balance	(234,000)	(172,000)	(173,000)
Other comprehensive (loss) income before reclassifications	(105,000)	(62,000)	1,000
Amounts reclassified from accumulated other comprehensive income (loss)	0	0	0
Other comprehensive income (loss), net of tax:	(105,000)		1,000
Net other comprehensive loss for the year		(62,000)
Ending balance	(339,000)	(234,000)	(172,000)
Net Unrealized Gains (Losses) on Available-for-Sale Securities [Member]
AOCI Attributable to Parent [Roll Forward]
Beginning balance	(69,000)	40,000	12,000
Other comprehensive (loss) income before reclassifications	55,000	(125,000)	30,000
Amounts reclassified from accumulated other comprehensive income (loss)	0	16,000	(2,000)
Other comprehensive income (loss), net of tax:	55,000		28,000
Net other comprehensive loss for the year		(109,000)
Ending balance	(14,000)	(69,000)	40,000
Accumulated Other Comprehensive Income (Loss)
AOCI Attributable to Parent [Roll Forward]
Beginning balance	(302,710)	(132,226)	(161,092)
Amounts reclassified from accumulated other comprehensive income (loss)	0	(16,000)	2,000
Other comprehensive income (loss), net of tax:	(50,088)	(170,484)	28,866
Ending balance	$ (352,798)	$ (302,710)	$ (132,226)