Shareholders' Equity - Activity of Company's Share Options (Detail) - $ / shares	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of Shares, Options outstanding, Beginning balance	680,142	635,642
Number of Shares, Granted	0	72,000
Number of Shares, Forfeited	(29,142)	(27,500)
Number of Shares, Options outstanding, Ending balance	651,000	680,142
Options Outstanding, Weighted Average Exercise Price, Beginning Balance	$ 1.80	$ 2.07
Exercisable, Number of Shares, Options outstanding, Ending balance	636,000	620,142
Weighted Average Exercise Price, Granted		$ 1.21
Weighted Average Exercise Price, Forfeited	$ 8.00	6.55
Options Outstanding, Weighted Average Exercise Price, Ending Balance	1.52	1.80
Exercisable, Weighted Average Exercise Price, Ending balance	1.52	1.81
Range of Exercise Prices, Granted		1.21
Range of Exercise Prices, Forfeited	8.00	6.55
Minimum [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Outstanding Options, Range of Exercise Prices, Beginning balance	0.71	0.71
Outstanding Options, Range of Exercise Prices, Ending balance	0.71	0.71
Exercisable, Range of Exercise Prices, Ending balance	0.71	0.71
Maximum [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Outstanding Options, Range of Exercise Prices, Beginning balance	8.00	8.00
Outstanding Options, Range of Exercise Prices, Ending balance	2.51	8.00
Exercisable, Range of Exercise Prices, Ending balance	$ 2.51	$ 8.00