Note 4 - Goodwill and Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2012

Schedule of Goodwill [Table Text Block]

	Sigma		Thermonics		Total
Balance - January 1, 2012	$	1,656	$	-	$	1,656
Acquisition of Thermonics		-		50		50
Balance - December 31, 2012	$	1,656	$	50	$	1,706

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

	December 31, 2012
	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Finite-lived intangible assets:
Customer relationships	$	1,480	$	439	$	1,041
Patented technology		590		233		357
Software		270		115		155
Trade name		140		33		107
Customer backlog		70		70		-
Non-compete/non-solicitation agreement		48		24		24
Total finite-lived intangible assets		2,598		914		1,684
Indefinite-lived intangible assets:
Sigma trademark		510		-		510
Total intangible assets	$	3,108	$	914	$	2,194

	December 31, 2011
	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Finite-lived intangible assets:
Customer relationships	$	370	$	200	$	170
Patented technology		230		150		80
Software		270		88		182
Total finite-lived intangible assets		870		438		432
Indefinite-lived intangible assets:
Sigma trademark		510		-		510
Total intangible assets	$	1,380	$	438	$	942

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

2013	$	446
2014	$	355
2015	$	289
2016	$	229
2017	$	212

Useful Life [Member]

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

	Estimated Useful Life		Remaining Estimated Useful Life at Dec. 31, 2012
	- - - - (in months) - - - -
Finite-lived intangible assets resulting from the acquisition of Sigma:
Customer relationships		72		21
Software		120		69
Patented technology		60		9
Finite-lived intangible assets resulting from the acquisition of Thermonics:
Customer relationships		72		60.5
Customer backlog		3		-
Trade name		48		36.5
Patented technology		132		120.5
Non-compete/non-solicitation agreement		18		9

Carrying Value Changes [Member]

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

Balance - January 1, 2012	$	432
Acquisition of Thermonics		1,728
Amortization		(476	)
Balance - December 31, 2012	$	1,684