Quarterly report pursuant to Section 13 or 15(d)

Liquidity and Management Plans - Additional Information (Detail)

v3.21.2
Liquidity and Management Plans - Additional Information (Detail) - USD ($)
3 Months Ended 9 Months Ended 12 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
Liquidity And Management Plans [Line Items]                  
Engineering product development $ 201,364     $ 61,500     $ 531,389 $ 237,350  
Net loss (12,464,526) $ (11,015,829) $ (8,525,763) (7,556,837) $ (8,204,666) $ (8,597,736) (32,006,118) (24,359,239)  
Net cash provided by (used in) operating activities             (22,498,803) (19,435,940)  
Proceeds of securities offerings               14,723,491 $ 53,556,202
Cash and cash equivalents, at carrying value, total 28,282,188           28,282,188   $ 50,729,661
Technology Service [Member]                  
Liquidity And Management Plans [Line Items]                  
Engineering product development $ 201,364     $ 61,500     $ 531,389 $ 237,350