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Stock Options - Stock options outstanding under the 2012 Employee Plan (Details)
12 Months Ended
Jun. 30, 2020
$ / shares
shares
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Options exercisable, Weighted average exercise price | $ / shares $ 21.96
2012 Employee Stock Option Plan [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Options outstanding, Number outstanding 117,840
Options outstanding, Weighted average remaining contractual life 8 years 4 months 24 days
Options outstanding, Weighted average exercise price | $ / shares $ 18.84
Options exercisable, Number exercisable 35,000
Options exercisable, Weighted average exercise price | $ / shares $ 6.50
2012 Employee Stock Option Plan [Member] | Exercise price range $ 4.29 - $ 9.63 [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Options outstanding, Number outstanding 117,840
Options outstanding, Weighted average remaining contractual life 8 years 4 months 24 days
Options outstanding, Weighted average exercise price | $ / shares $ 18.84
Options exercisable, Number exercisable 35,000
Options exercisable, Weighted average exercise price | $ / shares $ 6.50
2012 Non-Employee Stock Option Plan [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Options outstanding, Number outstanding 12,000
Options outstanding, Weighted average remaining contractual life 7 years 2 months 12 days
Options outstanding, Weighted average exercise price | $ / shares $ 10.29
Options exercisable, Number exercisable 5,760
Options exercisable, Weighted average exercise price | $ / shares $ 8.35
2012 Non-Employee Stock Option Plan [Member] | Exercise price range $4.37 - $8.70 [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Options outstanding, Number outstanding 12,000
Options outstanding, Weighted average remaining contractual life 7 years 2 months 12 days
Options outstanding, Weighted average exercise price | $ / shares $ 10.29
Options exercisable, Number exercisable 5,760
Options exercisable, Weighted average exercise price | $ / shares $ 8.35
2018 Non-Employee Stock Option Plan  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Options outstanding, Number outstanding 48,400
Options outstanding, Weighted average remaining contractual life 9 years 2 months 12 days
Options outstanding, Weighted average exercise price | $ / shares $ 23.48
Options exercisable, Number exercisable 12,240
2018 Non-Employee Stock Option Plan | Exercise price range $16.20 - $30.54 [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Options outstanding, Number outstanding 48,400
Options outstanding, Weighted average remaining contractual life 9 years 2 months 12 days
Options outstanding, Weighted average exercise price | $ / shares $ 23.48
Options exercisable, Number exercisable 12,240