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Note 7 - Stockholders' Equity (Detail) - Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Allocation of Recognized Period Costs	$ 1,319	$ 1,473	$ 2,224	$ 2,594
Cost of Sales [Member]
Allocation of Recognized Period Costs	432	522	751	990
Research and Development Expense [Member]
Allocation of Recognized Period Costs	251	337	438	680
Selling, General and Administrative Expenses [Member]
Allocation of Recognized Period Costs	$ 636	$ 614	$ 1,035	$ 924

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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