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Share-Based Compensation - Employee Stock Purchase Plan, Narrative (Details)
12 Months Ended
Jun. 30, 2019
USD ($)
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Number of shares purchased under the ESPP 0
ESPP  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Number of shares of common stock subject for purchase 400,000
Number of shares available for issuance 400,000
Purchase price of stock fair market value 85.00%
Maximum percentage of employee compensation 15.00%
Maximum number of shares that can be purchased during any offering period 3,000
Amount in excess of fair market value of stock for option not to be granted | $ $ 25,000
Offering period 6 months