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Fair Value of Financial Instruments
3 Months Ended
Mar. 31, 2015
Fair Value Disclosures [Abstract]  
Fair Value of Financial Instruments
Fair Value of Financial Instruments
Assets and Liabilities Measured at Fair Value on a Recurring Basis Using Significant Unobservable Inputs (Level 3)
The following table presents the changes in the Level 3 instruments measured at fair value on a recurring basis for the three months ended March 31, 2014 (in thousands):
 
 
 
2014
Warrant liability balance at January 1
 
$
4,446

Change in fair value
 
6,632

Warrant liability balance at March 31
 
$
11,078



For the three months ended March 31, 2015 we did not hold any Level 3 instruments measured at fair value on a recurring basis.
Assets and Liabilities Disclosed at Fair Value
As loans are not measured at fair value, the following discussion relates to estimating the fair value disclosure under ASC Topic 825. The fair value of loans is estimated by discounting scheduled cash flows through the estimated maturity. The estimated market discount rates used for loans are our current offering rates for comparable loans with similar terms.
The carrying amounts of certain of our financial instruments, including loans and loans held for sale, approximate fair value due to their short-term nature and are considered Level 3. The carrying amount of our financing obligations, such as fixed-rate debt, approximates fair value, considering the borrowing rates currently available to us for financing obligations with similar terms and credit risks.