Note 11 - Stock-based Compensation (Details) - Consolidated Stock-Based Compensation by Line Items (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock Based Compensation Expense	$ 51	$ 110	$ 158	$ 409
General and Administrative Expense [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock Based Compensation Expense	51	84	146	350
Selling and Marketing Expense [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock Based Compensation Expense		26	11	56
Engineering Design and Product Development [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock Based Compensation Expense			$ 1	$ 3