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SIGNIFICANT ACCOUNTING POLICIES (Narrative) (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Disclosure Of Accounting Policies [Line Items]      
Trust liabilities    $ 4,448  
Shipping expenses 4,047 3,808 2,065
Advertising expenses 412 479 678
Restricted cash held by trustees 3,221 1,664  
Convertible debt fair value     $ 13,937
Total weighted average number of shares related to outstanding options and RSUs excluded from the calculations of diluted net income (loss) per share 6,832,576 6,833,367 5,750,076
Short-Term [Member]
      
Disclosure Of Accounting Policies [Line Items]      
Restricted cash weighted average interest rate 0.24% 2.19%  
Long-Term [Member]
      
Disclosure Of Accounting Policies [Line Items]      
Restricted cash weighted average interest rate 0.50% 6.23%