Share-based Compensation - Employee Share Purchase Plan (Details) - Employee Stock [Member] - USD ($)	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018	Nov. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Duration of offering periods for ESPP (in months)	24 months
Percent of compensation allowed for purchase of options	15.00%
Payroll deduction accumulation period (in months)	6 months
Grant price, percent of fair value of common stock at date of grant	85.00%
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Number Of Shares Authorized For Purchase Per Purchase Date	200,000
Shares authorized under plan (in shares)				1,430,000
Weighted-average grant date fair value	$ 4.33	$ 3.84	$ 5.81
Fair Value Assumptions For ESPP
Expected option life (in years)	1 year 3 months 18 days	1 year 3 months 18 days	1 year 3 months 18 days
Dividend yield	0.00%	0.00%	0.00%
Minimum [Member]
Fair Value Assumptions For ESPP
Volatility rate	46.40%	40.10%	42.10%
Risk-free interest rate	2.00%	2.10%	1.40%
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of common shares that may be purchased on any purchase date by a participant (in shares)	875
Maximum number of common shares that may be purchased per a 24-month offering period by a participant (in shares)	3,500
Maximum value of common stock that may be purchased in any one calendar year	$ 25,000
Fair Value Assumptions For ESPP
Volatility rate	58.30%	40.70%	45.30%
Risk-free interest rate	1.60%	2.90%	2.60%