Condensed Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Thousands	Dec. 31, 2018	Jun. 30, 2018
Statement of Financial Position [Abstract]
Allowance for uncollectible accounts receivable	$ 3,385	$ 2,754
Convertible preferred stock, shares authorized	900,000	900,000
Convertible preferred stock, shares issued	445,063	445,063
Convertible preferred stock, shares outstanding	445,063	445,063
Convertible preferred stock, liquidation preference	$ 19,777	$ 19,443
Preferred stock, par value (in dollars per share)	$ 0	$ 0
Preferred stock, shares authorized	1,800,000	1,800,000
Preferred stock, shares issued	0	0
Common stock, par value (in dollars per share)	$ 0	$ 0
Common stock, shares authorized	640,000,000	640,000,000
Common stock, shares issued	60,013,718	59,998,811
Common stock, shares outstanding	60,013,718	59,998,811