SHARE-BASED COMPENSATION AND SHAREHOLDERS' EQUITY - Summary of grant date fair values and intrinsic values (Details 1) (Stock Options, USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average grant date fair value of options granted		$ 1.15	$ 0.96
Total intrinsic value of options exercised
Total fair value of options vested	$ 312	$ 282	$ 196