Note 7 - Stock Based Compensation (Details Textual) - USD ($)	3 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Delphax [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	0
Allocated Share-based Compensation Expense	$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	0	0
Allocated Share-based Compensation Expense	$ 0	$ 0
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options	$ 0