Note 4 - Accrued Liabilities

3 Months Ended

Mar. 31, 2012

Accounts Payable and Accrued Liabilities Disclosure [Text Block]

4. Accrued Liabilities- Accrued liabilities consist of the following (in thousands):

	March 31, 2012		December 31, 2011
Deferred revenue and customer prepayments	$	5,625	$	3,603
Stock rotation reserve		1,573		1,086
Legal expenses and settlement costs		723		911
Warranty		573		561
Other		1,656		1,684
Total accrued liabilities	$	10,150	$	7,845

A roll-forward of the warranty reserve for the three months ended March 31, 2012 and 2011 is as follows (in thousands):

	Three months ended March 31,
	2012			2011
Balance at beginning of year	$	561		$	764
Warranty costs		(6	)		(296	)
Unused warranty provision		(83	)		(121	)
Warranty provision for product sales		101			116
Balance at end of period	$	573		$	463