Note 2 - Summary of Significant Accounting Policies (Tables)

12 Months Ended

Mar. 31, 2016

Notes Tables

Schedule of Allowance for Accounts Receivable Ship and Debit [Table Text Block]

Balance March 31, 2013	$	1,396
Additions		4,757
Deductions		(5,082	)
Balance March 31, 2014		1,071
Additions		5,765
Deductions		(5,777	)
Balance March 31, 2015		1,059
Additions		4,479
Deductions		(4,672	)
Balance March 31, 2016	$	866

Schedule of Excess Inventory Reserve [Table Text Block]

Balance at March 31, 2013	$	25,289
Utilization or sale		(1,579	)
Scrap		(3,422	)
Additional provision		3,503
Foreign currency translation adjustments		513
Balance at March 31, 2014		24,304
Utilization or sale		(1,637	)
Scrap		(2,901	)
Additional provision		4,487
Foreign currency translation adjustments		(1,500	)
Balance at March 31, 2015		22,753
Utilization or sale		(2,455	)
Scrap		(3,217	)
Additional provision		4,125
Foreign currency translation adjustments		174
Balance at March 31, 2016	$	21,380