XML 58 R30.htm IDEA: XBRL DOCUMENT v3.19.1
Fair Value Measurements (Tables)
 12 Months Ended
Dec. 31, 2018
Fair Value Measurements  
Schedule of premium conversion derivative liabilities measured at fair value on recurring basis using unobservable level 3 inputs

The following table provides a roll‑forward of the Company’s premium conversion derivative liabilities measured at fair value on a recurring basis using unobservable level 3 inputs (in thousands):

 

 

 

 

 

 

 

 

 

 

 

 

 

For the Year Ended December 31, 

 

 

    

2018

    

2017

 

2016

 

Balance as of beginning of period

 

$

 —

 

$

 —

 

$

345

 

Issuance of underlying convertible notes

 

 

 —

 

 

 —

 

 

505

 

Change in fair value of premium conversion derivative

 

 

 —

 

 

 —

 

 

(850)

 

Reversal of premium conversion derivative associated with note extinguishment

 

 

—

 

 

—

 

 

—

 

Redemption of underlying convertible notes

 

 

—

 

 

—

 

 

—

 

Balance as of end of period

 

$

 —

 

$

 —

 

$

 —