Note 8 - Stock Based Compensation (Details Textual) - USD ($)	3 Months Ended		6 Months Ended
	Sep. 30, 2016	Jun. 30, 2016	Sep. 30, 2016	Sep. 30, 2015
Delphax [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period			0
Allocated Share-based Compensation Expense			$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross			0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period			0	0
Allocated Share-based Compensation Expense			$ 0	$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period	30,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross		0		0
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options	$ 0		$ 0