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Fair Value of Financial Instruments and Fair Value Measurements
6 Months Ended
Jun. 30, 2014
Fair Value of Financial Instruments and Fair Value Measurements

9. Fair Value of Financial Instruments and Fair Value Measurements

The carrying amounts of cash and cash equivalents, trade accounts receivable and accounts payable approximate fair value as of June 30, 2014 and December 31, 2013 because of the relatively short maturity of these instruments.