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VALUATION AND QUALIFYING ACCOUNTS (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Allowance for doubtful accounts
      
Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at Beginning of Period $ 27 $ 31 $ 36
Charged to Costs and Expenses         
Net (Write-Offs)/ Recoveries (5) (4) (5)
Balance at End of Period 22 27 31
Deferred tax asset valuation allowance
      
Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at Beginning of Period 3,783 3,677 3,459
Charged to Costs and Expenses 372 106 218
Net (Write-Offs)/ Recoveries         
Balance at End of Period $ 4,155 $ 3,783 $ 3,677