Financing Agreements (Details) (USD $)	1 Months Ended	12 Months Ended				0 Months Ended	1 Months Ended			12 Months Ended
	Feb. 29, 2012 Amended Credit Facility	Dec. 29, 2012 Amended Credit Facility	Dec. 29, 2012 Amended Credit Facility Period through September 30, 2015	Dec. 29, 2012 Amended Credit Facility Minimum	Dec. 29, 2012 Amended Credit Facility Maximum	Sep. 21, 2011 Second Amendment to the Amended Credit Facility	Feb. 29, 2012 Third Amendment to the Amended Credit Facility	Feb. 29, 2012 Third Amendment to the Amended Credit Facility Minimum	Feb. 22, 2012 Third Amendment to the Amended Credit Facility Minimum	Dec. 29, 2012 Fourth Amendment Period ending March 30, 2013 Subsequent event	Dec. 29, 2012 Fourth Amendment Period ending June 29, 2013 Subsequent event	Dec. 29, 2012 Fourth Amendment Period through ending on September 30, 2016 Subsequent event
Financing agreement
Annual capital expenditure allowed under credit facility	$ 2,000,000					$ 2,500,000
Increase in the total availability of the credit facility							4,000,000
Trailing period under financial covenants		12 months					12 months
Trailing twelve months earnings before taxes financial covenant, prior to amendment								800,000
Trailing twelve months earnings before taxes financial covenant, subsequent to amendment								250,000		(100,000)	(300,000)	250,000
Excess borrowing base availability each year as per financial covenant									3,000,000
Maximum borrowing capacity		15,000,000
Base rate		three-month LIBOR
Spread over base rate (as a percent)				1.50%	2.50%
One-time origination fee		150,000
Unused line fee (as a percent)		0.25%		0.25%	0.375%
Effective interest rate (as a percent)		2.375%
Period of notice for termination or reduction of credit facility		90 days
Termination fee as percentage of maximum line amount			0.25%
Total availability under credit facility		$ 10,900,000