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Note 15 - Stock-Based Compensation (Detail) - Allocation of Share-Based Compensation Expense (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Cost of Sales [Member]
Allocated Share-Based Compensation Expense	$ 5	$ 10
Selling Expense [Member]
Allocated Share-Based Compensation Expense	9	15
Engineering and Product Development Expense [Member]
Allocated Share-Based Compensation Expense	24	40
General and Administrative Expense [Member]
Allocated Share-Based Compensation Expense	75	81
Total [Member]
Allocated Share-Based Compensation Expense	$ 113	$ 146

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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