Note 1 - Organization and Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2012

Allowance for Credit Losses on Financing Receivables [Table Text Block]

Year	Balance at January 1		Provision charged to expense		Write-offs / Recoveries			Balance at December 31
2010	$	70	$	50	$	(38	)	$	82
2011	$	82	$	510	$	(162	)	$	430
2012	$	430	$	246	$	(216	)	$	460

Schedule of Comprehensive Income (Loss) [Table Text Block]

	December 31,
	2012			2011
Foreign currency translation adjustments	$	(384	)	$	346
Unrealized gain from marketable securities, net of tax		(8	)		35
Accumulated Other Comprehensive Income, net of tax	$	(392	)	$	381

Schedule of Finite-Lived Intangible Assets [Table Text Block]

					2012							2011
Description of Other Intangible	Amortization Period (years)				Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Customer lists		3	-	15	$	4,567	$	(2,186	)	$	2,381	$	4,567	$	(1,779	)	$	2,788
Tradenames			8			351		(175	)		176		351		(132	)		219
Patent assets		12	-	18		2,083		(667	)		1,416		1,802		(530	)		1,272
Covenants not to compete		5	-	6		376		(313	)		63		376		(237	)		139
Acquired technologies		7	-	8		1,731		(929	)		802		1,731		(707	)		1,024
Total					$	9,108	$	(4,270	)	$	4,838	$	8,827	$	(3,385	)	$	5,442

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]

Year	Estimated Amortization Expense
2013	$	801
2014		737
2015		704
2016		685
2017		374
Thereafter		1,537
Total	$	4,838

Property, Plant and Equipment [Table Text Block]

Description of Property and Equipment	Depreciable Life (years)				2012			2011
Land					$	1,440		$	1,440
Building			39			4,535			4,535
Building and leasehold improvements		3	-	39		4,480			4,448
Field equipment		3	-	4		17,746			16,429
Computer equipment and software		2	-	3		3,151			3,529
Furniture and fixtures		3	-	10		1,782			1,451
Vehicles			5			36			32
Total cost						33,170			31,864
Less accumulated depreciation						(19,421	)		(18,239	)
Total net book value					$	13,749		$	13,625

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

	2012		2011		2010
Basic weighted-average shares		22,709,000		24,095,000		24,213,000
Conversion of unsecured loan notes		7,000		7,000		7,000
Unexercised options		63,000		188,000		185,000
Unvested restricted stock units		756,000		343,000		-
Diluted weighted-average shares		23,535,000		24,633,000		24,405,000