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Redeemable Convertible Preferred Stock - Series A (Tables)
9 Months Ended
Sep. 30, 2018
Temporary Equity Disclosure [Abstract]  
Summary of Reconciliation of Carrying Value of Series A Preferred Stock

The following is a reconciliation of the carrying value of the Series A Preferred (in thousands):

 

    December 31, 2017     September 30, 2018  
Gross proceeds from Series A Preferred offering   $ 20,055     $ 20,055  
Issuance costs – cash     (2,055 )     (2,055 )
Issuance costs – common stock warrants     (479 )     (479 )
Accrued dividends on Series A Preferred     643       1,543  
Deemed dividends for accretion of Series A Preferred issuance costs     840       2,097  
Balance as of the end of the period   $ 19,004     $ 21,161