INCOME TAXES (Details 3) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Dec. 31, 2012
Tax credits
Additional provision for income taxes related to the undistributed earnings	$ 0
Unremitted earnings		252
Additional tax liability as a result of the distribution of earnings which are expected to be permanently reinvested	0
Federal | Research and development
Tax credits
Available tax credits		4,502
State | Research and development
Tax credits
Available tax credits		3,577
State | Investment
Tax credits
Available tax credits		$ 100