Other Income, Net - Schedule of Other Income, Net (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Other Income Disclosure Nonoperating [Abstract]
Interest income									$ 4,092	$ 3,207	$ 1,058
Interest expense									(229)	(825)	(427)
Revaluation of warrant liabilities and forfeiture of warrants									(717)
Other									14	(49)	1
Total	$ 764	$ 1,397	$ 360	$ 639	$ 596	$ 734	$ 686	$ 317	$ 3,160	$ 2,333	$ 632