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Fair Value Measurements
3 Months Ended
Mar. 31, 2013
Fair Value Measurements [Abstract]  
Fair Value Measurements

(11) Fair Value Measurements

     The carrying amounts of financial instruments including cash and cash equivalents, accounts receivable, account payables, accrued liabilities and long term debt in our balance sheet approximates fair value as of March 31, 2013 and December 31, 2012.