Schedule II - Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Trade Receivable Allowances
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning Balance	$ 17	$ 75	$ 111
Chargeback Additions	93	162	469
Chargeback Reductions	(103)	(220)	(505)
Ending Balance	7	17	75
Valuation Allowance for Deferred Tax Assets
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning Balance	67,703	53,760	27,902
Chargeback Additions	0	13,959	26,230
Chargeback Reductions	(19,333)	(16)	(372)
Ending Balance	$ 48,370	$ 67,703	$ 53,760