Note 1 - Summary of Significant Accounting Policies (As Restated) - Product Warranty Reserve Activity (Details) - USD ($)	12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Beginning Balance	$ 231,803	$ 242,000
Amounts charged to expense	140,768	169,683
Actual warranty costs paid	(166,916)	(179,880)
Delphax acquisition	60,800
Ending Balance	$ 266,455	$ 231,803