Note 2 - Allowance for Ship and Debit (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2014
Beginning Balance	$ 1,059	$ 1,071	$ 1,396
Additions	4,479	5,765	4,757
Deductions	(4,672)	(5,777)	(5,082)
Ending Balance	$ 866	$ 1,059	$ 1,071