Note 2 - Summary of Significant Accounting Policies (Detail) - Property and equipment	12 Months Ended
	Mar. 31, 2013
Building and Building Improvements [Member] | Minimum [Member]
Estimated Useful Life	5 years
Building and Building Improvements [Member] | Maximum [Member]
Estimated Useful Life	25 years
Machinery, Equipment, Furniture and Fixtures [Member] | Minimum [Member]
Estimated Useful Life	3 years
Machinery, Equipment, Furniture and Fixtures [Member] | Maximum [Member]
Estimated Useful Life	15 years
Leasehold Improvements [Member] | Minimum [Member]
Estimated Useful Life	5 years
Leasehold Improvements [Member] | Maximum [Member]
Estimated Useful Life	20 years