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Fair Value of Financial Assets and Liabilities
3 Months Ended
Mar. 31, 2020
Fair Value Disclosures [Abstract]  
Fair Value of Financial Assets and Liabilities Fair Value of Financial Assets and Liabilities
The following tables present information about the Company’s financial assets and liabilities measured at fair value on a recurring basis and indicate the level of the fair value hierarchy used to determine such fair values:
Fair Value Measurements as of March 31, 2020 Using:
(in thousands)Level 1Level 2Level 3Total
Assets:
Cash equivalents—money market funds$48,770  $6,417  $—  $55,187  
$48,770  $6,417  $—  $55,187  
Liabilities:  None
Fair Value Measurements as of December 31, 2019 Using:
(in thousands)Level 1Level 2Level 3Total
Assets:
Cash equivalents—money market funds$23,638  $39,999  $—  $63,637  
$23,638  $39,999  $—  $63,637  
Liabilities: None
The Company’s cash equivalents consisted of money market funds invested in U.S. Treasury securities. The money market funds were valued based on reported market pricing for the identical assets, which represents a Level 1 measurement, or by using inputs observable in active markets for similar securities, which represents a Level 2 measurement.
During the three months ended March 31, 2020, the Company refinanced its Amended and Restated Loan and Security Agreement (as defined in Note 7) with Hercules Capital Inc. (“Hercules”). The debt refinancing was deemed to be an extinguishment of the June 2019 Amended and Restated Loan and Security Agreement (the “previous debt”) in exchange for the Amended Loan Agreement (the “new debt”) as further described in Note 7. The loss on extinguishment was calculated as the difference between the carrying amount of the previous debt and the fair value of the new debt, which is a non-recurring Level 3 measure. The fair value of the new debt was calculated based on the cash flows of the new debt, including end-of-term payments, interest payments, principal payments and lender fees, discounted to present value using the appropriate market rate. The market rate is a significant unobservable input. The Company developed a range of market rates in reference to the Company's recent borrowing activities with this lender, which are deemed to be reflective of the market rate. The Company considered a range from 10.5% to 12.5% and determined that 11.5% represented a reasonable rate for purposes of determining the fair value of the new debt, which was $25.3 million.