Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Summary of changes in fair value of the Company's warrant liability measured at fair value using significant unobservable inputs (Level 3) (Details)

v3.20.2
Fair Value Measurements - Summary of changes in fair value of the Company's warrant liability measured at fair value using significant unobservable inputs (Level 3) (Details) - Warrant [Member] - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Beginning balance $ 5 $ 103 $ 24 $ 210
Additions 0 0 0 4
Change in fair value (5) (64) (24) (175)
Ending balance $ 0 $ 39 $ 0 $ 39