Note 5. INDEBTEDNESS (Details) (USD $)	3 Months Ended	6 Months Ended			6 Months Ended	12 Months Ended
	Jun. 27, 2014	Jun. 27, 2014	Jun. 27, 2013	Feb. 19, 2014	Jun. 27, 2014 PBLoanAmountOutstanding	Dec. 31, 2013 PBLoanAmountOutstanding
Note 5. INDEBTEDNESS (Details) [Line Items]
Notes Payable, Noncurrent				$ 27,000,000
Line of Credit Facility, Maximum Borrowing Capacity				3,000,000
Line of Credit Facility, Fair Value of Amount Outstanding	25,100,000	25,100,000
Line of Credit Facility, Maximum Month-end Outstanding Amount		1,200,000
Line of Credit Facility, Collateral Fees, Amount		1,500,000
Line of Credit Facility, Collateral Fees		$1.0
Line of Credit Facility, Maximum Amount Outstanding During Period					22,200,000	7,700,000
Line of Credit Facility, Interest Rate at Period End	0.50%	0.50%
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage		0.25%
Interest Expense, Borrowings	54,000		215,000
Debt Issuance Cost		109,000
Amortization of Debt Discount (Premium)	$ 54,000	$ 102,000