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VALUATION AND QUALIFYING ACCOUNTS
 12 Months Ended
Dec. 31, 2014
Valuation and Qualifying Accounts [Abstract]  
VALUATION AND QUALIFYING ACCOUNTS

SCHEDULE II — VALUATION AND QUALIFYING ACCOUNTS

 

     Balance at
beginning of
period		      Additions      Deduction      Balance at
end of period		  

Year ended December 31, 2014

            

Allowance for doubtful accounts

    $ —         $ 25       $ —         $ 25   

Year ended December 31, 2013

            

Allowance for doubtful accounts

    $ 9       $ —         $ 9       $ —     

Year ended December 31, 2012

            

Allowance for doubtful accounts

    $ 25       $ —         $ 16       $ 9