BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) (USD $) Share data in Millions, except Per Share data, unless otherwise specified	1 Months Ended	6 Months Ended				0 Months Ended
	Feb. 28, 2014	Jun. 29, 2014	Jun. 30, 2013	Dec. 31, 2013	Dec. 31, 2012	Apr. 12, 2013 Revolving Credit Facility	Jun. 29, 2014 Revolving Credit Facility
Accounting Policies [Line Items]
Cash and cash equivalents		$ 20,667,000	$ 14,924,000	$ 14,578,000	$ 14,354,000
Working capital		63,500,000
Credit Agreement, term						3 years
Credit Agreement, maximum borrowing capacity						25,000,000
Credit Agreement, amount outstanding		0		14,000,000			0
Stock Issued During Period, Shares, New Issues	14.1
StockOfferingPricePerShare	$ 2.45
Proceeds from issuance of common stock, net	$ 31,700,000	$ 31,921,000	$ 260,000