Note 7 - Income Taxes - Schedule of Income Tax Provisions (Details) - USD ($) |
12 Months Ended | ||
|---|---|---|---|
Mar. 31, 2018 |
Mar. 31, 2017 |
Mar. 31, 2016 |
|
| Current taxes | |||
| Federal, Current taxes | $ 5,899,574 | $ 6,034,924 | $ 5,754,428 |
| State, Current taxes | 160,670 | 138,689 | 186,822 |
| Deferred taxes | |||
| Federal, Deferred taxes | 31,800 | (25,196) | (55,254) |
| State, Deferred taxes | 4,108 | (1,275) | (1,214) |
| Income tax provision | $ 6,096,152 | $ 6,147,142 | $ 5,884,782 |