Note 4 - Accrued Liabilities (Tables)

3 Months Ended

Mar. 31, 2013

Schedule of Accrued Liabilities [Table Text Block]

	March 31, 2013		December 31, 2012
Deferred revenue and customer prepayments	$	2,885	$	2,198
Stock rotation reserve		1,554		961
Legal expenses and settlement costs		599		402
Warranty		275		331
Other		2,366		2,023
Total accrued liabilities	$	7,679	$	5,915

Schedule of Product Warranty Liability [Table Text Block]

	Three months ended March 31,
	2013			2012
Balance at beginning of year	$	331		$	561
Warranty provision for product sales		103			101
Settlements made during the period		(93	)		(6	)
Unused warranty provision		(66	)		(83	)
Balance at end of period	$	275		$	573