Note 12 - Related Party Transactions (Details Textual) $ in Millions	3 Months Ended		6 Months Ended		9 Months Ended		12 Months Ended
	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Mar. 31, 2021 USD ($)	Mar. 31, 2020 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Sep. 30, 2021
Chalet [Member]
Number of Operating Leases	4				4
Finance Lease, Number of Lease	1				1
Related Party Transaction Number of Owners That Are Non-Independent Board Members of the Entity							4
Related Party Transaction, Expenses from Transactions with Related Party	$ 0.2	$ 0.2			$ 0.7	$ 0.7
Isely Family Land Trust LLC [Member]
Number of Operating Leases	1				1
Related Party Transaction, Expenses from Transactions with Related Party	$ 0.1	0.1	$ 0.2	$ 0.2
FTVC, LLC [Member]
Number of Operating Leases	1				1
Related Party Transaction Number of Owners That Are Non-Independent Board Members of the Entity					4
FTVC, LLC [Member] | Maximum [Member]
Related Party Transaction, Expenses from Transactions with Related Party	$ 0.1	$ 0.1			$ 0.1	$ 0.1