Note 16 - Income Taxes - Deferred Tax Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Mar. 31, 2015
Deferred tax assets:
Reserves and allowances	$ 6,018	$ 5,612
Other liabilities and accruals	6,176	5,929
Depreciable assets	83	2,951
Net operating loss carryforward	11,675	13,993
Share-based compensation	5,098	4,971
Credits carryforward	2,440	2,403
Total deferred tax assets	31,490	35,859
Less: Valuation allowance and other reserves	(3,466)	(3,902)
Net deferred tax asset	$ 28,024	$ 31,957