NET INCOME (LOSS) PER SHARE (Details) (USD $) Share data in Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 29, 2014	Jun. 30, 2013	Jun. 29, 2014	Jun. 30, 2013
Schedule of Earnings Per Share [Line Items]
Net income (loss)	$ 1,916,000	$ (3,567,000)	$ 4,381,000	$ (13,075,000)
Weighted Average Number of Shares Outstanding Reconciliation
Weighted-average shares outstanding - basic	73,532	58,891	69,943	58,810
Weighted-average shares outstanding - diluted	74,679	58,891	71,405	58,810
Basic (in dollars per share)	$ 0.03	$ (0.06)	$ 0.06	$ (0.22)
Diluted (in dollars per share)	$ 0.03	$ (0.06)	$ 0.06	$ (0.22)
Stock Options and Restricted Stock Units
Weighted Average Number of Shares Outstanding Reconciliation
Antidilutive securities excluded from computation of earnings per share	$ 2,900,000	$ 6,400,000	$ 2,500,000	$ 6,400,000
Stock Options and Restricted Stock Units
Weighted Average Number of Shares Outstanding Reconciliation
Effect of dilutive stock options and restricted stock units	1,147	0	1,462	0