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Note 11 - Stock-based Compensation (Detail) - Consolidated Stock-Based Compensation by Line Items (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Stock-based compensation expense	$ 71	$ 98
General and Administrative Expense [Member]
Stock-based compensation expense	59	82
Selling and Marketing Expense [Member]
Stock-based compensation expense	11	14
Engineering Design and Product Development [Member]
Stock-based compensation expense	$ 1	$ 2

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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