Note 14 - Income Taxes (Details) - Significant Components of Deferred Tax Assets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Deferred tax assets
Collectability reserves	$ 158	$ 1,389
Reserve for inventory write-off	606	474
Reserve for sales discounts	179	116
Accrued vacations	41	39
Inventory — uniform capitalization	273	132
Net operating loss carryforward	37,743	30,663
Stock based compensation	895	626
Other	3,252	3,624
Total deferred tax assets	43,147	37,063
Deferred tax liabilities
Book/tax depreciation	(1,292)	(2,899)
Book/tax intangibles amortization	(3,672)	(5,135)
Net deferred tax assets (liabilities)	38,183	29,029
Valuation allowance	(39,462)	(30,308)
Total deferred tax asset (liability), net	$ (1,279)	$ (1,279)