Note 8 - Financing Arrangements (Details Textual)	9 Months Ended
	Dec. 31, 2015 USD ($)	Mar. 31, 2015 USD ($)
Revolving Credit Facility [Member] | Letter of Credit [Member]
Line of Credit Facility, Maximum Borrowing Capacity	$ 500,000
Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member]
Derivative, Basis Spread on Variable Rate	1.50%
Revolving Credit Facility [Member] | Delphax [Member]
Line of Credit Facility, Maximum Borrowing Capacity	$ 7,000,000
Debt Instrument, Interest Rate, Effective Percentage	4.25%
Long-term Line of Credit	$ 181,000
Line of Credit Facility, Additional Borrowing Capacity	2,828,000
Revolving Credit Facility [Member]
Line of Credit Facility, Maximum Borrowing Capacity	$ 20,000,000
Line of Credit Facility, Commitment Fee Percentage	0.15%
Minimum Consolidated Tangible Net Worth	$ 22,000,000
Minimum Fixed Charge Coverage Ratio	1.35
Minimum Asset Coverage Ratio	1.75
Maximum Leverage Ratio	3.5
Delphax [Member] | Secured Equipment Loan [Member]
Debt Instrument, Interest Rate, Effective Percentage	4.50%
Debt Instrument, Face Amount	$ 134,000
Debt Instrument, Periodic Payment, Principal	2,000
Long-term Debt	$ 38,000
Secured Long-term Debt, Noncurrent		$ 7,000,000