Note 3 - Acquisition (Tables)

9 Months Ended

Sep. 30, 2012

Schedule of Purchase Price Allocation [Table Text Block]

Goodwill	$	50
Identifable intangible assets		1,728
Tangible assets acquired and liabilities assumed:
Trade accounts receivable		1,161
Inventories		874
Property and equipment		263
Accounts payable		(77	)
Accrued non-compete/non-solicitation payments		(48	)
Accrued sales commissions		(82	)
Accrued warranty		(67	)
Total purchase price	$	3,802

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

	Sept. 30, 2012
	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Finite-lived intangible assets:
Customer relationships	$	1,480	$	377	$	1,103
Patented technology		590		212		378
Software		270		108		162
Trade name		140		25		115
Customer backlog		70		70		-
Non-compete/non-solicitation agreement		48		16		32
Total finite-lived intangible assets		2,598		808		1,790
Indefinite-lived intangible assets:
Sigma trademark		510		-		510
Total intangible assets	$	3,108	$	808	$	2,300

	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

Business Acquisition, Pro Forma Information [Table Text Block]

	Three Months Ended Sept. 30,				Nine Months Ended Sept. 30,
	2012		2011		2012		2011
Net revenues	$	10,799	$	13,223	$	35,322	$	41,268
Net earnings		658		5,417		2,537		8,093
Diluted earnings per share	$	0.06	$	0.53	$	0.25	$	0.79

Thermonics [Member]

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

	Fair Value		Weighted Average Estimated Useful Life (in months)
Customer relationships	$	1,110		72
Customer backlog		70		3
Thermonics trade name		140		48
Patented technology		360		132
Non-compete/non-solicitation agreement		48		18
Total intangible assets	$	1,728		78.3