STOCK-BASED COMPENSATION (Details 2) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Stock-based compensation expense:
Stock-based compensation expense	$ 1,902	$ 3,494	$ 4,436
Total option exercise recognized tax benefit			4
Selling, general and administrative expense
Stock-based compensation expense:
Stock-based compensation expense	1,872	3,466	4,400
Research and development expense
Stock-based compensation expense:
Stock-based compensation expense	$ 30	$ 28	$ 36