Note 9 - Variable Interest Entities (Details Textual)			3 Months Ended	9 Months Ended		12 Months Ended
	Jan. 06, 2017 USD ($)	Nov. 24, 2015 USD ($) $ / shares shares	Jun. 30, 2016 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Mar. 31, 2016 USD ($)	Jul. 26, 2017 USD ($)	Mar. 31, 2017 USD ($)		Jan. 05, 2017 USD ($)	Nov. 24, 2016 USD ($)
Short-term Debt				$ 2,500,000				$ 25,000	[1]
Goodwill				4,417,605				4,417,605	[1]
Investments in Funds, Noncurrent				$ 227,000					[1]
Delphax [Member]
Percentage of Consolidated Subsidiaries Dividends Attributable to Parent				67.00%
Percentage of Consolidated Subsidiaries Dividends Attributable to Noncontrolling Interests				33.00%
Net Income (Loss) Attributable to Noncontrolling Interest, Percentage				3.19%	33.00%
Delphax [Member]
Goodwill											$ 375,000
Goodwill, Impairment Loss			$ 275,000			$ 100,000
Delphax [Member] | Trade Names and Patents [Member]
Impairment of Intangible Assets, Finite-lived			1,385,000			50,000
Delphax [Member]
Line of Credit Facility, Maximum Borrowing Capacity	$ 2,500,000									$ 7,000,000
Repayments of Long-term Lines of Credit	$ 1,260,000
Line of Credit Facility, Maximum Borrowing Capacity, Percentage of Purchase Orders from Customers	100.00%
Line of Credit Facility, Maximum Borrowing Capacity, Maximum Value of Purchase Orders Included in Borrowing Base	$ 500,000
Line of Credit Facility, Interest Rate at Period End	2.50%
Delphax [Member] | Delphax Canada [Member]
Financing Receivable, Net							$ 1,510,000
Upon Execution of the Amendment [Member] | Delphax [Member]
Line of Credit Facility, Commitment Fee Amount	$ 25,000
Upon Repayment in Full of All Loans Under the Senior Credit Agreement [Member] | Delphax [Member]
Line of Credit Facility, Commitment Fee Amount	$ 50,000
Delphax [Member]
Severance Costs			$ 5,610,000
Intangible Assets, Net (Including Goodwill)						$ 1,400,000
Delphax [Member] | Senior Subordinated Note [Member]
Short-term Debt				$ 1,675,000				2,500,000
Delphax [Member] | Senior Subordinated Note [Member] | Short-term Debt [Member]
Interest Payable, Current				786,000				388,000
Delphax [Member] | Delphax Senior Credit Agreement [Member]
Short-term Debt				0				1,541,000
Delphax [Member] | Delphax Senior Debt [Member]
Short-term Debt								$ 112,000
Delphax [Member] | Senior Subordinated Note and Delphax Senior Debt Credit Agreement [Member] | Nonoperating Income (Expense) [Member]
Interest Expense				567,000	$ 172,000
Investment Funds Purchased from Blue Clay Capital Management, LLC [Member]
Investments in Funds, Noncurrent				$ 227,000
Delphax [Member]
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
Delphax [Member] | Series B Preferred Stock of Delphax [Member]
Business Combination, Shares Acquired | shares		43,000
Business Combination, Warrants Acquired, Number of Securities Called by Warrants | shares		95,600
Business Combination, Warrants Acquired, Exercise Price Per Share | $ / shares		$ 33.4728
Convertible Preferred Stock, Shares Issued upon Conversion | shares		100
Business Combination,Shares Acquired, Percentage, of the Shares of Acquired Entity's Common Stock That Would Be Outstanding Assuming Conversion		38.00%
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] | Delphax [Member]
Debt Instrument, Face Amount		$ 2,500,000
Debt Instrument, Interest Rate, Stated Percentage		8.50%
Delphax 90-Day Senior Subordinated Note [Member] | Delphax [Member]
Debt Instrument, Cancellation, Outstanding Principal Surrendered		$ 500,000
Senior Notes [Member] | Delphax Canada [Member]
Debt Instrument, Interest Rate, Stated Percentage	18.00%									10.50%
Line of Credit Facility, Forbearance Fee Amount	$ 141,000

[1] Derived from audited consolidated financial statements