Significant Accounting Policies (Details 5) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 28, 2014	Jun. 29, 2013	Jun. 28, 2014	Jun. 29, 2013
Basic and diluted income per share
Options and warrants excluded from computation of earnings per share (in shares)	386	612	375	550
Numerator:
Net income (loss) attributable to controlling interest	$ 592	$ 768	$ 1,563	$ 952
Denominator:
Weighted average shares outstanding - basic	5,581	5,556	5,579	5,556
Employee stock options (in shares)	111	0	101	0
Stock warrants (in shares)	200	153	197	140
Weighted average shares outstanding - diluted (in shares)	5,892	5,709	5,877	5,696
Income per share:
Basic (loss) (in dollars per share)	$ 0.11	$ 0.14	$ 0.28	$ 0.17
Diluted (in dollars per share)	$ 0.10	$ 0.13	$ 0.27	$ 0.17