Note 5 - Related Party Transactions (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011
Capital Leases, Income Statement, Amortization Expense	$ 154		$ 461
Capital Lease, Monthly Payment			124
IncrementInCapitalLeasePaymentsPerYear			2.00%
EffectiveRateOnCapitalLeaseObligation			9.90%
Capital Leases, Income Statement, Interest Expense	338	341	1,016	1,024
Small Kits And Trays [Member] | Custom Healthcare [Member]
Related Party Transaction, Purchases from Related Party	455		1,344
Sterile Instruments [Member] | Custom Healthcare [Member]
Revenue from Related Parties	215		678
AVID Facility [Member]
Area Of Manufacturing And Warehouse Building (in Square feet)	185,000		185,000
Area of Land (in Acres)	12		12
Cost of Sales [Member]
Capital Leases, Income Statement, Amortization Expense	35		106
Portion Included in Selling, General, And Administrative Expenses [Member]
Capital Leases, Income Statement, Amortization Expense	119		355
Custom Healthcare [Member]
Due from Related Parties	188		188
Due to Related Parties	$ 20		$ 20