Note 3 - Acquisition (Tables)

3 Months Ended

Mar. 31, 2013

Schedule of Purchase Price Allocation [Table Text Block]

Goodwill	$	50
Identifiable 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]

	March 31, 2013
	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Finite-lived intangible assets:
Customer relationships	$	1,480	$	509	$	971
Patented technology		590		254		336
Software		270		122		148
Trade name		140		42		98
Customer backlog		70		70		-
Non-compete/non-solicitation agreement		48		32		16
Total finite-lived intangible assets		2,598		1,029		1,569
Indefinite-lived intangible assets:
Sigma trademark		510		-		510
Total intangible assets	$	3,108	$	1,029	$	2,079

	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

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