Summary of Significant Accounting Policies; Prior Period Reclassification (Tables)
 12 Months Ended
Dec. 31, 2019
Accounting Policies [Abstract]  
Reconciliation of Cash and Restricted Cash Below is a reconciliation of cash and restricted cash at December 31, 2019 and 2018 (in thousands):

 

 

 

December 31,

 

 

 

2019

 

 

2018

 

Cash

 

$

2,232

 

 

$

1,147

 

Restricted cash (short term)

 

 

1,196

 

 

 

2,012

 

Restricted cash (non-current)

 

 

—

 

 

 

—

 

Total

 

$

3,428

 

 

$

3,159

 

 
Summary of Financial Assets and Liabilities Measured at Fair Value The table below provides a summary of the changes in fair value, including net transfers in and/or out, of all financial assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) during the year ended December 31, 2019 (in thousands):

 

 

 

Derivative

Liability

 

Balance, December 31, 2018

 

$

—

 

Initial recognition of conversion features and warrants

 

 

7,954

 

Change in fair value of derivative liability

 

 

(6,233

)

Balance, December 31, 2019

 

$

1,721