Debt (Details) (USD $)	3 Months Ended		6 Months Ended	9 Months Ended			1 Months Ended	9 Months Ended		9 Months Ended
	Sep. 29, 2012	Oct. 01, 2011	Jun. 30, 2012	Sep. 29, 2012	Oct. 01, 2011	Dec. 31, 2011	Apr. 20, 2012 Gibraltar Business Capital, LLC [Member] New Credit Facility [Member]	Sep. 29, 2012 Gibraltar Business Capital, LLC [Member] New Credit Facility [Member]	Nov. 09, 2012 Gibraltar Business Capital, LLC [Member] New Credit Facility [Member]	Sep. 29, 2012 Gibraltar Business Capital, LLC [Member] Letter of Credit [Member]	Sep. 29, 2012 Gibraltar Business Capital, LLC [Member] Amended New Credit Facility [Member]	Sep. 29, 2012 Promissory Note on EOC Acquisition [Member]	Mar. 20, 2012 Promissory Note on EOC Acquisition [Member]
Debt Instrument [Line Items]
Purchase price on acquisition of EOC	$ 509,000			$ 509,000								$ 509,000
EOC purchase price paid at closing	200,000			200,000								200,000
Promissory note issued by the company				290,000								309,000
Discount on note payable													19,000
Term of debt instrument												3 years
Stated percentage (in hundredths)												5.00%
Periodic payment on acquisition price												28,000
Maturity date												Apr. 01, 2015
Outstanding notes payable	266,000			266,000
Current maturity of note payable	99,000			99,000		0
Note payable, less current maturity	167,000			167,000		0
Line of Credit Facility [Line Items]
Maximum borrowing capacity								5,000,000
Expiration date								Apr. 20, 2014
Term of credit facility							2 years
Net borrowings on revolving credit facility				1,524,000	0			1,524,000
Amount outstanding								2,425,000
Available borrowing capacity								2,535,000	1,908,000
Reduction of letter of credit outstanding										40,000
Borrowing base as percentage of net amount of eligible accounts receivable, maximum (in hundredths)								85.00%
Borrowing designated for capital expenditure per annum								300,000
Interest rate description								the greater of (i) prime rate plus 3%, or (ii) 6.25% per annum			the greater of (i) prime rate (the prime rate at September 29, 2012 was 3.25%) plus 6.25%, or (ii) 9.50% per annum
Net loss exceeding the limit set forth in debt covenant								1,750,000
Actual net loss	(717,000)	(1,042,000)	2,720,000	(3,437,000)	(4,100,000)
Revised net income (loss) covenant				$ 3,500,000				$ 3,500