STOCK-BASED COMPENSATION (Details) (USD $)	3 Months Ended
	Mar. 30, 2013	Mar. 31, 2012
Total stock-based compensation expense included in the Company's consolidated statements of operations
Stock-based compensation expense	$ 2,269,000	$ 2,214,000
Unrecognized total compensation cost
Unrecognized stock-based compensation expense related to non-vested stock-based awards	7,600,000
Estimated forfeitures	1,500,000
Weighted-average period over which unrecognized stock-based compensation cost is expected to be recognized	1 year 4 months 24 days
Cost of sales
Total stock-based compensation expense included in the Company's consolidated statements of operations
Stock-based compensation expense	209,000	117,000
Selling, general and administrative expenses
Total stock-based compensation expense included in the Company's consolidated statements of operations
Stock-based compensation expense	1,820,000	1,839,000
Research and development expense
Total stock-based compensation expense included in the Company's consolidated statements of operations
Stock-based compensation expense	$ 240,000	$ 258,000