Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 941	$ 7,117	$ 59,064	$ 10,509
Other comprehensive income:
Foreign currency translation adjustment		22	23	5
Total other comprehensive income		22	23	5
Comprehensive income	$ 941	$ 7,139	$ 59,087	$ 10,514