Note 7 - Stock-based Compensation (Details Textual) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Dec. 31, 2016	Dec. 31, 2016	Dec. 31, 2015
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options	$ 0	$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period	0	30,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	0	0	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	0	0	0
Allocated Share-based Compensation Expense	$ 0	$ 0	$ 0

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section S99
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-Subparagraph (SAB Topic 14.F)
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Unrecognized cost of unvested options awarded to employees as compensation.

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Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements.

+ References

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

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

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