Note 15 - Income Taxes (Detail) (USD $)	9 Months Ended	12 Months Ended		33 Months Ended
	Dec. 31, 2010	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Mar. 31, 2010
Income Tax Expense (Benefit)	$ 7,602,000	$ (15,712,000)	$ (226,000)
Income Taxes Paid	759,000	364,000	2,000
Proceeds from Income Tax Refunds	1,649,000	1,494,000	544,000
Deferred Tax Liabilities, Gross		43,035,000	30,926,000	43,035,000
Deferred Tax Assets, Valuation Allowance		37,173,000	69,508,000	37,173,000
Valuation Allowance, Deferred Tax Asset, Change in Amount		(32,300,000)	(900,000)
Deferred Tax Assets, Operating Loss Carryforwards, Domestic		126,000,000		126,000,000
Deferred Tax Assets, Operating Loss Carryforwards, State and Local		150,400,000		150,400,000
Deferred Tax Assets, Tax Credit Carryforwards, Research		29,659,000	29,659,000	29,659,000
Deferred Tax Assets, Tax Credit Carryforwards, Foreign		7,528,000	10,035,000	7,528,000
Unrecognized Tax Benefits	31,818,000	26,419,000	29,903,000	26,419,000	23,925,000
Unrecognized Tax Benefits that Would Impact Effective Tax Rate		7,400,000		7,400,000
Unrecognized Tax Benefits, Period Increase (Decrease)				(3,500,000)
Singapore [Member] | Payment For Prior Year Assessments [Member]
Income Taxes Paid		3,500,000
Singapore [Member]
Proceeds from Income Tax Refunds		1,400,000
Domestic Tax Authority [Member]
Deferred Tax Assets, Tax Credit Carryforwards, Research		30,300,000		30,300,000
State and Local Jurisdiction [Member]
Deferred Tax Assets, Tax Credit Carryforwards, Research		17,700,000		17,700,000
Undistributed Earnings of Foreign Subsidiaries and Foreign Corporate Joint Ventures [Member]
Deferred Tax Liabilities, Gross		29,600,000	30,700,000	29,600,000
Release Of A Portion Of The Valuation Allowance And A Refund Received As A Result Of A Tax Settlement In Singapore [Member]
Income Tax Expense (Benefit)		(15,700,000)
Changes in Judgment Related To Ongoing Audits In Foreign Jurisdictions [Member]
Income Tax Expense (Benefit)	7,900,000
Refund Received As A Result Of A Settlement In Singapore [Member]
Income Tax Expense (Benefit)		(1,400,000)
Expires In Various Years Beginning In 2012 [Member]
Deferred Tax Assets, Tax Credit Carryforwards, Foreign		1,600,000		1,600,000
Stock Option Deductions [Member]
Deferred Tax Assets, Operating Loss Carryforwards, Domestic		$ 10,200,000		$ 10,200,000