Note 10 - Employee and Non-employee Stock Options (Details Textual) - Employee and Non Employee Director Options [Member] - USD ($) shares in Thousands	3 Months Ended
Jun. 30, 2018	Jun. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	0	0
Allocated Share-based Compensation Expense, Total	$ 0	$ 0
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options	$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	0	0
Delphax [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	0	0
Allocated Share-based Compensation Expense, Total	$ 0	$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	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.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
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-Section 50
-Paragraph 1
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-Section S99
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Period Type:	duration

- Definition

Unrecognized cost of unvested options awarded to employees as compensation.

+ References

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- Definition

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

+ References

No definition available.

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Period Type:	duration

- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
-Topic 718
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-Section 50
-Paragraph 2
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