Unaudited Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2019	Jun. 30, 2018
Statement Of Financial Position [Abstract]
Accounts receivable, allowance for doubtful accounts (in dollars)	$ 563	$ 251
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, authorized shares	200,000,000	200,000,000
Common stock, issued shares	88,020,073	86,129,256
Common stock, outstanding shares	88,020,073	86,129,256