Quarterly report pursuant to Section 13 or 15(d)

Organization and Description of the Business (Details)

v3.21.2
Organization and Description of the Business (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2021
Jun. 30, 2021
Mar. 31, 2021
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
Organization and Description of the Business                  
Number of operating segments             1    
Accumulated deficit $ 480,149,000           $ 480,149,000   $ 442,514,000
Net loss $ 13,771,000 $ 14,022,000 $ 9,842,000 $ 5,551,000 $ 6,222,000 $ 5,725,000 $ 37,635,000 $ 17,498,000