Note 4 - Accrued Liabilities (Tables)

6 Months Ended

Jun. 30, 2012

Schedule of Accrued Liabilities [Table Text Block]

	June 30, 2012		December 31, 2011
Deferred revenue and customer prepayments	$	2,820	$	3,603
Stock rotation reserve		1,203		1,086
Legal expenses and settlement costs		607		911
Warranty		443		561
Other		1,775		1,684
Total accrued liabilities	$	6,848	$	7,845

Schedule of Product Warranty Liability [Table Text Block]

	Six months ended June 30,
	2012			2011
Balance at beginning of year	$	561		$	764
Warranty costs		(124	)		(333	)
Unused warranty provision		(213	)		(220	)
Warranty provision for product sales		219			515
Balance at end of period	$	443		$	726