Business Segments - Summary of company's operations (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting Information [Line Items]
Revenues from unaffiliated customers	$ 30,310	$ 30,510
Cost of goods sold, exclusive of depreciation and amortization	(22,799)	(22,416)
Selling, general and administrative	(5,638)	(5,047)
Interest expense	(41)	(52)
Depreciation and amortization	(640)	(614)
Other income, net	42	14
Income (loss) from continuing operations before income tax provision (benefit)	1,234	2,395
Income tax provision (benefit)	259	748
Income (loss) from continuing operations	975	1,647
Discontinued Operations:
Loss from operations of a discontinued component, net of income tax benefit		(647)
Loss on disposal of QCC and AMP, net of income tax benefit		(680)
Loss from discontinued operation		(1,327)
Net income (loss)	975	320
Capital expenditures	1,563	885
Operating Segments
Segment Reporting Information [Line Items]
Revenues from unaffiliated customers	30,310	30,510
Cost of goods sold, exclusive of depreciation and amortization	(22,799)	(22,416)
Selling, general and administrative	(5,638)	(5,047)
Interest expense	(41)	(52)
Depreciation and amortization	(640)	(614)
Other income, net	42	14
Income (loss) from continuing operations before income tax provision (benefit)	1,234	2,395
Income tax provision (benefit)	259	748
Income (loss) from continuing operations	975	1,647
Discontinued Operations:
Loss from operations of a discontinued component, net of income tax benefit		(647)
Loss on disposal of QCC and AMP, net of income tax benefit		(680)
Loss from discontinued operation		(1,327)
Net income (loss)	975	320
Capital expenditures	1,563	885
Operating Segments | ATG
Segment Reporting Information [Line Items]
Revenues from unaffiliated customers	22,204	22,000
Cost of goods sold, exclusive of depreciation and amortization	(16,155)	(15,275)
Selling, general and administrative	(3,985)	(3,319)
Interest expense	(41)	(52)
Depreciation and amortization	(452)	(432)
Other income, net	(2)	4
Income (loss) from continuing operations before income tax provision (benefit)	1,569	2,926
Income tax provision (benefit)	329	915
Income (loss) from continuing operations	1,240	2,011
Discontinued Operations:
Loss from operations of a discontinued component, net of income tax benefit
Loss on disposal of QCC and AMP, net of income tax benefit
Loss from discontinued operation
Net income (loss)	1,240	2,011
Capital expenditures	1,191	574
Operating Segments | CPG
Segment Reporting Information [Line Items]
Revenues from unaffiliated customers	8,106	8,510
Cost of goods sold, exclusive of depreciation and amortization	(6,644)	(7,141)
Selling, general and administrative	(1,653)	(1,728)
Interest expense
Depreciation and amortization	(188)	(182)
Other income, net	44	10
Income (loss) from continuing operations before income tax provision (benefit)	(335)	(531)
Income tax provision (benefit)	(70)	(167)
Income (loss) from continuing operations	(265)	(364)
Discontinued Operations:
Loss from operations of a discontinued component, net of income tax benefit		(647)
Loss on disposal of QCC and AMP, net of income tax benefit		(680)
Loss from discontinued operation		(1,327)
Net income (loss)	(265)	(1,691)
Capital expenditures	$ 372	$ 311