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Shareholders' Equity - Activity of Company's Share Options (Detail) - $ / shares
12 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]    
Number of Shares, Options outstanding, Beginning balance 480,000 595,000
Number of Shares, Granted 0 50,000
Number of Shares, Exercised (70,000) 0
Number of Shares, Forfeited   (165,000)
Number of Shares, Options outstanding, Ending balance 410,000 480,000
Exercisable, Number of Shares, Options outstanding, Ending balance 410,000 480,000
Options Outstanding, Weighted Average Exercise Price, Beginning Balance $ 1.35 $ 1.53
Weighted Average Exercise Price, Granted   1.38
Weighted Average Exercise Price, Exercised 1.39  
Weighted Average Exercise Price, Forfeited   2.01
Options Outstanding, Weighted Average Exercise Price, Ending Balance 1.34 1.35
Exercisable, Weighted Average Exercise Price, Ending balance 1.34 1.35
Range of Exercise Prices, Granted   1.38
Minimum    
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
Range of Exercise Prices, Exercised 0.71  
Range of Exercise Prices, Forfeited   1.79
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 1.79 2.09
Range of Exercise Prices, Exercised 1.79  
Range of Exercise Prices, Forfeited   2.09
Outstanding Options, Range of Exercise Prices, Ending balance 1.79 1.79
Exercisable, Range of Exercise Prices, Ending balance $ 1.79 $ 1.79