Note 8 - Acquisition of Interests in Delphax (As Amended) (Details Textual) - Delphax [Member] - USD ($)		12 Months Ended
	Nov. 24, 2015	Mar. 31, 2016
Payments to Acquire Businesses, Gross	$ 1,050,000
Business Combination, Warrants Acquired, Condition Under Which Warrants May Be Exercised for Cash, Number of Times the Aggregate Exercise Price	0.95
Business Combination, Warrants Acquired, Exercise for Cash, Measurement Period	20 days
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt	$ 3,313,317
Business Combination, Acquisition Related Costs		$ 110,000
Series B Preferred Stock of Delphax [Member]
Business Combination, Shares Acquired	43,000
Business Combination, Warrants Acquired, Number of Securities Called by Warrants	95,600
Business Combination, Warrants Acquired, Exercise Price Per Share	$ 33.4728
Convertible Preferred Stock, Shares Issued upon Conversion	100
Business Combination,Shares Acquired, Percentage, of the Shares of Acquired Entity's Common Stock That Would Be Outstanding Assuming Conversion	38.00%
Business Combination, Shares Acquired, Percentage of the Shares of Acquired Entity's Common Stock that Would Be Outstanding Assuming Conversion and Issuance of All Shares Reserved for Issuance Under Employee Stock Option Plans	31.00%
Percentage of Preferred Stock Initially Purchasable under Warrant Permitted to Acquire	50.00%
Shares of Preferred Stock Acquired in Connection With the Exercise of the Warrant as a Percentage of the Number of Preferred Shares Initially Purchasable under the Warrant	50.00%
Five Year Senior Subordinated Promissory Note [Member]
Debt Instrument, Face Amount	$ 2,500,000
Debt Instrument, Interest Rate, Stated Percentage	8.50%
Delphax 90-Day Senior Subordinated Note [Member]
Debt Instrument, Cancellation, Outstanding Principal Surrendered	$ 500,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt	$ 508,000