Note 3 - Taxation (Tables)

12 Months Ended

Dec. 31, 2012

Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block]

Origin of income before taxes	2012			2011		2010
United States	$	5,655		$	8,244	$	4,144
Foreign		(577	)		1,013		(458	)
Income before taxes	$	5,078		$	9,257	$	3,686

Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]

	2012			2011		2010
Current:
Federal	$	1,529		$	1,456	$	2,520
State		425			402		414
Foreign		471			482		103
Total current		2,425			2,340		3,037
Deferred:
Federal		9			674		(1,051	)
State		1			95		(97	)
Foreign		(133	)		-		44
Total deferred		(123	)		769		(1,104	)
Income tax expense	$	2,302		$	3,109	$	1,933

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

	2012			2011			2010
Provision at the U.S. federal statutory rate		34.0	%		34.0	%		35.0	%
State taxes, net of federal benefit		4.2	%		3.2	%		3.9	%
Foreign tax rate differential		0.0	%		(1.2	%)		0.6	%
Valuation allowance		10.5	%		2.7	%		6.5	%
Research credits		(10.0	%)		(6.5	%)		0.0	%
Stock-based compensation		0.3	%		0.0	%		4.4	%
Other		6.3	%		1.4	%		2.0	%
Income tax expense effective rate		45.3	%		33.6	%		52.4	%

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

	2012			2011
Deferred tax assets:
Stock compensation expense	$	7,936		$	7,734
Alternative minimum tax credit		71			71
Warranty reserve		291			118
Accounts receivable		65			161
Vacation accrual		157			118
Commissions and other accruals		205			-
Deferred rent liability		53			47
Equipment		69			-
Intangible assets		778			603
Net operating loss carryforwards		1,868			1,327
Total deferred tax assets		11,493			10,179
Deferred tax liabilities:
Equipment		(1,466	)		(1,513	)
Prepaid expenses		(200	)		(285	)
Patents		(489	)		(384	)
Goodwill		(3,193	)		(2,689	)
Other		(16	)		(20	)
Total deferred tax liabilities		(5,364	)		(4,891	)
Net deferred tax asset before valuation allowance		6,129			5,288
Valuation allowances for deferred tax assets		(1,868	)		(1,327	)
Net deferred tax asset	$	4,261		$	3,961

Schedule of Amounts Recognized in Balance Sheet [Table Text Block]

Current assets	$	573	$	163
Long-term assets		3,688		3,798
Net deferred tax asset	$	4,261	$	3,961

Summary of Valuation Allowance [Table Text Block]

Year	Balance at January 1		Charged to costs and expenses		(Deductions)/Other			Balance at December 31
2010	$	1,177		-		(75	)	$	1,102
2011	$	1,102		-		225		$	1,327
2012	$	1,327		-		541		$	1,868

Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]

Description	2012			2011			2010
Balance at beginning of period	$	505		$	664		$	724
Increases in positions taken in a prior period		-			-			-
Decreases in positions taken in a prior period		-			-			-
Increases in positions taken in a current period		39			117			60
Decreases in positions taken in a current period		-			-			-
Decreases due to settlements		(202	)		-			-
Decreases due to lapse of statute of limitations		(303	)		(276	)		(120	)
Balance at end of period	$	39		$	505		$	664