Condensed Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Thousands	Mar. 31, 2020	Jun. 30, 2019
Statement of Financial Position [Abstract]
Allowance for uncollectible accounts receivable	$ 6,952	$ 4,866
Preferred stock, par value (in dollars per share)	$ 0	$ 0
Preferred stock, shares authorized (in shares)	1,800,000	1,800,000
Preferred stock, shares issued (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0	$ 0
Common stock, shares authorized (in shares)	640,000,000	640,000,000
Common stock, shares issued (in shares)	64,448,957	60,008,481
Common stock, shares outstanding (in shares)	64,448,957	60,008,481
Convertible preferred stock, shares authorized (in shares)	900,000	900,000
Convertible preferred stock, shares issued (in shares)	445,063	445,063
Convertible preferred stock, shares outstanding (in shares)	445,063	445,063
Convertible preferred stock, liquidation preference	$ 20,778	$ 20,111