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Note 15 - Employee and Non-Employee Stock Options (Details Textual) - USD ($)
4 Months Ended 12 Months Ended
Mar. 31, 2016
Mar. 31, 2016
Mar. 31, 2015
Mar. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant 40,000 40,000    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Number of Shares   0 10,000 2,500
Delphax [Member]        
Allocated Share-based Compensation Expense $ 30,000      
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options $ 373,000 $ 373,000    
Delphax [Member] | Certain Employees of Delphax [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross 1,200,000      
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price $ 0.33      
Employee and Non Employee Director Options [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross   0 0  
Allocated Share-based Compensation Expense   $ 0 $ 9,000  
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options $ 0 $ 0    
Common Stock [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross   256,000    
Exercise Price to Fair Market Value   100.00%