Note 7 - Stock Based Compensation - Summary of Stock Option Activity (Details)	9 Months Ended
Dec. 31, 2016 shares	Dec. 31, 2015 shares
Outstanding (in shares)	40,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	0	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period
Canceled (forfeited/expired) (in shares)	(30,000)
Outstanding (in shares)	10,000
Exerciseable (in shares)	10,000

The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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-Name Accounting Standards Codification
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For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

+ References

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Gross number of share options (or share units) granted during the period.

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Number of options outstanding, including both vested and non-vested options.

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Number of share options (or share units) exercised during the current period.

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