Note 12 - Leasing Arrangements (Details Textual) - USD ($)	9 Months Ended
	Nov. 30, 2020	Nov. 30, 2019	Mar. 01, 2019
Operating Lease, Expense	$ 630,871	$ 702,872
Operating Lease, Liability, Total	$ 2,148,744
Operating Lease, Weighted Average Discount Rate, Percent	3.40%
Lessee, Operating Lease, Liability, to be Paid, Total	$ 2,371,096
Company-owned Location [Member]
Operating Lease, Liability, Total		476,611
Lessee, Operating Lease, Liability, to be Paid, Total		$ 532,811
Accounting Standards Update 2016-02 [Member]
Operating Lease, Liability, Total			$ 3,300,000
Maximum [Member]
Lessee, Operating Lease, Term of Contract (Year)	10 years
Lessee, Operating Lease, Renewal Term (Year)	10 years
Minimum [Member]
Lessee, Operating Lease, Renewal Term (Year)	5 years