14. Quarterly Financial Data (Unaudited) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended	12 Months Ended
Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Quarterly Financial Data Details
Sales, net	$ 5,768	$ 8,112	$ 9,327	$ 4,369	$ 5,743	$ 6,976	$ 4,671	$ 6,714	$ 27,576	$ 24,104	$ 25,954
Gross profit	2,730	4,028	4,640	1,667	2,366	3,509	1,656	2,601
Net (loss) income	$ 336	$ 884	$ 1,246	$ (401)	$ 136	$ 914	$ (855)	$ (688)	$ 2,065	$ (493)	$ (660)
(Loss) earnings per share – basic	$ 0.03	$ 0.07	$ 0.09	$ (0.03)	$ 0.01	$ 0.07	$ (0.06)	$ (0.05)	$ 0.15	$ (0.04)	$ (0.05)
(Loss) earnings per share – diluted	$ 0.03	$ 0.07	$ 0.09	$ (0.03)	$ 0.01	$ 0.07	$ (0.06)	$ (0.05)	$ 0.15	$ (0.04)	$ (0.05)

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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+ Details

- Definition

The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

+ References+ Details

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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-Name Regulation S-X (SX)

-Number 210

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-Glossary Other Comprehensive Income

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Reference 7: http://www.xbrl.org/2003/role/presentationRef

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Reference 8: http://www.xbrl.org/2003/role/presentationRef

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-Glossary Net Income

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-Publisher AICPA

-Name Accounting Research Bulletin (ARB)

-Number 51

-Paragraph A7

-Appendix A

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-Name Accounting Research Bulletin (ARB)

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Reference 16: http://www.xbrl.org/2003/role/presentationRef

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+ Details