Note 2 - Allowance For Loan Losses: Schedule of Loans and Financing Receivable (Details) - USD ($)	Mar. 31, 2019	Mar. 31, 2018
Financing Receivable, before Allowance for Credit Loss	$ 723,236,417	$ 594,921,292
Financing Receivable, percent of portfolio	100.00%	100.00%
Financing Receivable, 3-months net charge-offs	$ 10,042,569	$ 8,200,608
Financing Receivable, percent net charge-offs	100.00%	100.00%
Cosumer Loans
Financing Receivable, before Allowance for Credit Loss	$ 637,352,022	$ 532,171,218
Financing Receivable, percent of portfolio	88.10%	89.50%
Financing Receivable, 3-months net charge-offs	$ 9,574,180	$ 7,910,902
Financing Receivable, percent net charge-offs	95.30%	96.50%
Real Estate Loans
Financing Receivable, before Allowance for Credit Loss	$ 32,049,450	$ 27,298,599
Financing Receivable, percent of portfolio	4.40%	4.50%
Financing Receivable, 3-months net charge-offs	$ (15,086)	$ 10,399
Financing Receivable, percent net charge-offs	(0.10%)	0.10%
Sales Finance Contracts
Financing Receivable, before Allowance for Credit Loss	$ 53,834,945	$ 35,451,475
Financing Receivable, percent of portfolio	7.50%	6.00%
Financing Receivable, 3-months net charge-offs	$ 483,475	$ 279,307
Financing Receivable, percent net charge-offs	4.80%	3.40%