Note 4 - Components of Common Shares Outstanding (Details) - shares |
3 Months Ended | |
|---|---|---|
Jun. 30, 2016 |
Jun. 30, 2015 |
|
| Weighted average common shares outstanding – basic (in shares) | 4,835,010 | 4,854,841 |
| Dilutive effect of stock options (in shares) | 2,085 | 6,007 |
| Shares used in computing net income per share – diluted (in shares) | 4,837,095 | 4,860,848 |