Note 7 - Stock Based Compensation (Details Textual) - USD ($) shares in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	0	0	0	0
Allocated Share-based Compensation Expense	$ 0	$ 0
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options	$ 0		$ 0
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