Note 10 - Financing Arrangements (Details Textual) - Revolving Credit Facility [Member]	12 Months Ended
	Mar. 31, 2016 USD ($)
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
Long-term Line of Credit	$ 0
LIBOR Rate	0.44%
Delphax [Member]
Long-term Line of Credit	$ 1,833,000
Debt Instrument, Interest Rate, Effective Percentage	4.25%
Line of Credit Facility, Additional Borrowing Capacity	$ 800,000
Delphax [Member]
Line of Credit Facility, Maximum Borrowing Capacity	$ 7,000,000
London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument, Basis Spread on Variable Rate	1.50%
London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member]
Derivative, Basis Spread on Variable Rate	1.50%
Letter of Credit [Member]
Line of Credit Facility, Maximum Borrowing Capacity	$ 500,000