Note 16 - Segment Information (Details) - Segment Information (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Net revenues from unaffiliated customers:
Revenues	$ 39,426	$ 43,376
Depreciation/amortization:
Depreciation/Amortization	847	933
Operating income (loss):
Operating Income (Loss)	3,962	2,996
Earnings (loss) before income tax expense (benefit):
Earnings (loss) before income tax expense (benefit)	4,008	3,053
Income tax expense (benefit):
Income Tax Expense (Benefit)	931	897
Net earnings (loss):
Net earnings (loss)	3,077	2,156
Capital expenditures:
Capital Expenditures	424	431
Identifiable assets:
Identifiable Assets	35,481	32,399
Long-lived Assets	1,254	1,250
Thermal Products [Member]
Net revenues from unaffiliated customers:
Revenues	22,962	24,307
Depreciation/amortization:
Depreciation/Amortization	695	816
Operating income (loss):
Operating Income (Loss)	4,322	2,939
Earnings (loss) before income tax expense (benefit):
Earnings (loss) before income tax expense (benefit)	4,327	2,958
Income tax expense (benefit):
Income Tax Expense (Benefit)	1,005	869
Net earnings (loss):
Net earnings (loss)	3,322	2,089
Capital expenditures:
Capital Expenditures	349	216
Identifiable assets:
Identifiable Assets	23,934	20,849
Mechanical Products [Member]
Net revenues from unaffiliated customers:
Revenues	9,962	9,904
Depreciation/amortization:
Depreciation/Amortization	79	73
Operating income (loss):
Operating Income (Loss)	(784)	(1,944)
Earnings (loss) before income tax expense (benefit):
Earnings (loss) before income tax expense (benefit)	(772)	(1,934)
Income tax expense (benefit):
Income Tax Expense (Benefit)	(179)	(568)
Net earnings (loss):
Net earnings (loss)	(593)	(1,366)
Capital expenditures:
Capital Expenditures	16	37
Identifiable assets:
Identifiable Assets	7,093	7,737
Electrical Products [Member]
Net revenues from unaffiliated customers:
Revenues	6,502	9,165
Depreciation/amortization:
Depreciation/Amortization	73	44
Operating income (loss):
Operating Income (Loss)	722	2,023
Earnings (loss) before income tax expense (benefit):
Earnings (loss) before income tax expense (benefit)	751	2,051
Income tax expense (benefit):
Income Tax Expense (Benefit)	174	602
Net earnings (loss):
Net earnings (loss)	577	1,449
Capital expenditures:
Capital Expenditures	59	178
Identifiable assets:
Identifiable Assets	4,454	3,813
Corporate Segment [Member]
Operating income (loss):
Operating Income (Loss)	(298)	(22)
Earnings (loss) before income tax expense (benefit):
Earnings (loss) before income tax expense (benefit)	(298)	(22)
Income tax expense (benefit):
Income Tax Expense (Benefit)	(69)	(6)
Net earnings (loss):
Net earnings (loss)	(229)	(16)
UNITED STATES
Net revenues from unaffiliated customers:
Revenues	13,337	15,915
Identifiable assets:
Long-lived Assets	700	899
Foreign [Member]
Net revenues from unaffiliated customers:
Revenues	26,089	27,461
Identifiable assets:
Long-lived Assets	$ 554	$ 351