CONSOLIDATED BALANCE SHEETS (Parentheticals) - $ / shares	Sep. 30, 2020	Jun. 30, 2020
Preferred stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Preferred stock, shares authorized	16,000,000	16,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock-Class A
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized	300,000,000	300,000,000
Common stock, shares issued	20,287,574	20,287,574
Common stock, shares outstanding	20,287,574	20,287,574
Common stock-Class B
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized	30,000,000	30,000,000
Common stock, shares issued	20,166,034	20,166,034
Common stock, shares outstanding	20,166,034	20,166,034