Note 7 - Leases and Related Party Transactions (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2014 acre	Mar. 31, 2013	Mar. 31, 2012
Note 7 - Leases and Related Party Transactions (Details) [Line Items]
Area of Real Estate Property (in Square Feet)	25
EffectiveRateOnCapitalLeaseObligation	9.90%
Capital Leases, Income Statement, Amortization Expense	$ 614
Operating Leases, Rent Expense	628	579	488
AVID Facility - Manufacturing and Warehouse Building [Member]
Note 7 - Leases and Related Party Transactions (Details) [Line Items]
Area of Real Estate Property (in Square Feet)	185,000
AVID Facility - Land [Member]
Note 7 - Leases and Related Party Transactions (Details) [Line Items]
Area of Land (in Acres)	12
AVID Facility [Member]
Note 7 - Leases and Related Party Transactions (Details) [Line Items]
Capital Lease, Monthly Payment	129
Increment In Capital Lease Payments Per Year	2.00%
Selling, General and Administrative [Member]
Note 7 - Leases and Related Party Transactions (Details) [Line Items]
Capital Leases, Income Statement, Amortization Expense	141
Cost of Sales [Member]
Note 7 - Leases and Related Party Transactions (Details) [Line Items]
Capital Leases, Income Statement, Amortization Expense	$ 473