Note 3 - Income Taxes (Details Textual) - USD ($)	3 Months Ended		9 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Nov. 24, 2015	Sep. 30, 2015	Nov. 25, 2014
Delphax [Member]
Business Acquisition, Percentage of Voting Interests Acquired					38.00%
Delphax [Member] | Domestic Tax Authority [Member] | Alternative Minimum Tax Credit Carryforward [Member]
Tax Credit Carryforward, Amount						$ 325,000
Delphax [Member] | Domestic Tax Authority [Member]
Operating Loss Carryforwards						13,900,000
Delphax [Member] | Foreign Tax Authority [Member] | Research Tax Credit Carryforward [Member]
Tax Credit Carryforward, Amount						3,900,000
Delphax [Member] | Foreign Tax Authority [Member]
Operating Loss Carryforwards						$ 8,000,000
Income Tax Expense (Benefit)	$ 1,499,000	$ 690,617	$ 2,867,000	$ 1,494,821
Deferred Tax Assets, Valuation Allowance	$ 12,003,000		$ 12,003,000				$ 11,661,000