Note 6 - Net Income (Loss) Per Share - Reconciliation of the Components of Basic and Diluted Net Loss Per Share (Details) - USD ($)	3 Months Ended						9 Months Ended
	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Mar. 31, 2021	Mar. 31, 2020
Net income (loss) for the period	$ (4,510,158)	$ (3,214,045)	$ 33,442,625	$ (1,910,324)	$ (2,928,532)	$ (1,851,334)	$ 25,718,422	$ (6,690,191)
Weighted Average Shares, basic (in shares)	6,153,334			6,550,068			6,261,102	6,449,345
Income Per Share, basic (in dollars per share)	$ (0.73)			$ (0.29)			$ 4.11	$ (1.04)
Income Per Share, diluted (in dollars per share)	$ (0.73)			$ (0.29)			$ 4.11	$ (1.04)
Weighted Average Shares, basic (in shares)	6,153,334			6,550,068			6,261,102	6,449,345
Income Per Share, basic (in dollars per share)	$ (0.73)			$ (0.29)			$ 4.11	$ (1.04)
Weighted Average Shares, diluted (in shares)							6,261,102	6,449,345
Income Per Share, diluted (in dollars per share)	$ (0.73)			$ (0.29)			$ 4.11	$ (1.04)