Note 4 - Accrued Liabilities

6 Months Ended

Jun. 30, 2013

Payables and Accruals [Abstract]

Accounts Payable and Accrued Liabilities Disclosure [Text Block]

4. Accrued Liabilities

Accrued liabilities consist of the following (in thousands):

	June 30, 2013		December 31, 2012
Deferred revenue and customer prepayments	$	2,742	$	2,198
Stock rotation reserve		1,092		961
Legal expenses and settlement costs		954		402
Sales rebate		884		575
Commissions		536		464
Warranty		334		331
Other		1,032		984
Total accrued liabilities	$	7,574	$	5,915

A roll-forward of the warranty reserve is as follows (in thousands):

	Three months ended June 30,						Six months ended June 30,
	2013			2012			2013			2012
Balance at beginning of period	$	275		$	573		$	331		$	561
Warranty provision for product sales		113			117			215			219
Settlements made		(3	)		(118	)		(95	)		(124	)
Unused warranty provision		(51	)		(129	)		(117	)		(213	)
Balance at end of period	$	334		$	443		$	334		$	443