Note 13 - Business Concentrations and Major Customers (Detail)	9 Months Ended
	Dec. 31, 2012
Owens & Minor, Inc. [Member]
Entity-Wide Revenue, Major Customer, Percentage	41.00%
Cardinal Health Inc. [Member]
Entity-Wide Revenue, Major Customer, Percentage	23.00%
Minimum [Member]
Days Until Receivables Are Generally Due	30 days
Maximum [Member]
Days Until Receivables Are Generally Due	90 days