Note 4 - Components of Common Shares Outstanding (Details) - shares |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2015 |
Sep. 30, 2014 |
Sep. 30, 2015 |
Sep. 30, 2014 |
|
| Basic (in shares) | 4,855,398 | 4,855,071 | 4,858,557 | 4,853,068 |
| Dilutive effect of stock options (in shares) | 2,735 | 16,958 | 3,874 | 15,701 |
| Shares used in computing net income per share – diluted (in shares) | 4,858,133 | 4,872,029 | 4,862,431 | 4,868,769 |