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SIGNIFICANT ACCOUNTING POLICIES (Narrative) (Details) (USD $)
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Nov. 30, 2012
SIGNIFICANT ACCOUNTING POLICIES [Abstract]        
Trade receivables, allowances for doubtful accounts $ 415,000 $ 395,000   $ 415,000
Bad debt (income) expense 20,000    (609,000)  
Bad debt write offs 206,000 0 0  
Inventory write offs 311,000 0 0  
Shares excluded from the calculation of diluted net income (loss) per share 1,248,631 988,642 504,309  
Uncertain tax position, likelihood of being sustained, threshold for recognition 50.00%      
Years employment required for eligibility for severance pay 1      
Months severance salary payable per year of employment 1      
Severance pay expenses $ 588,000 $ 651,000 $ 431,000  
Number of suppliers of certain key components 1