Quarterly report pursuant to Section 13 or 15(d)

Condensed Statement of Changes in Stockholders' Equity

v3.21.2
Condensed Statement of Changes in Stockholders' Equity - USD ($)
Total
Common Stock [Member]
Additional Paid-in Capital [Member]
Accumulated Deficit [Member]
Beginning balance at Dec. 31, 2019 $ 19,012,874 $ 333 $ 282,153,201 $ (263,140,660)
Beginning balance (in shares) at Dec. 31, 2019   33,203,806    
Stock-based compensation - restricted stock units ("RSUs") 2,321,820   2,321,820  
Stock-based compensation - performance share units ("PSUs") (88,348)   (88,348)  
Stock-based compensation - employee stock purchase plan ("ESPP") 42,827   42,827  
Issuance of shares for RSUs   $ 4 (4)  
Issuance of shares for RSUs (in shares)   396,559    
Proceeds from contributions to the ESPP 113,059   113,059  
Issuance of shares in an at-the-market ("ATM")offering, net of issuance costs 5,506,880 $ 44 5,506,836  
Issuance of shares in an at-the-market ("ATM") offering, net of issuance costs (in shares)   4,351,652    
Net loss (8,597,736)     (8,597,736)
Ending balance at Mar. 31, 2020 18,311,376 $ 381 290,049,391 (271,738,396)
Ending balance (in shares) at Mar. 31, 2020   37,952,017    
Beginning balance at Dec. 31, 2019 19,012,874 $ 333 282,153,201 (263,140,660)
Beginning balance (in shares) at Dec. 31, 2019   33,203,806    
Net loss (24,359,239)      
Ending balance at Sep. 30, 2020 19,042,028 $ 431 306,541,496 (287,499,899)
Ending balance (in shares) at Sep. 30, 2020   43,062,944    
Beginning balance at Mar. 31, 2020 18,311,376 $ 381 290,049,391 (271,738,396)
Beginning balance (in shares) at Mar. 31, 2020   37,952,017    
Stock-based compensation - restricted stock units ("RSUs") 2,028,599   2,028,599  
Stock-based compensation - employee stock purchase plan ("ESPP") 41,308   41,308  
Issuance of shares for RSUs   $ 2 (2)  
Issuance of shares for RSUs (in shares)   232,995    
Proceeds from contributions to the ESPP 104,145 $ 1 104,144  
Proceeds from contributions to the ESPP (in shares)   144,370    
Issuance of shares in an at-the-market ("ATM")offering, net of issuance costs 9,216,611 $ 33 9,216,578  
Issuance of shares in an at-the-market ("ATM") offering, net of issuance costs (in shares)   3,355,928    
Net loss (8,204,666)     (8,204,666)
Ending balance at Jun. 30, 2020 21,497,373 $ 417 301,440,018 (279,943,062)
Ending balance (in shares) at Jun. 30, 2020   41,685,310    
Stock-based compensation - restricted stock units ("RSUs") 1,876,686   1,876,686  
Stock-based compensation - employee stock purchase plan ("ESPP") 96,056   96,056  
Issuance of shares for RSUs   $ 4 (4)  
Issuance of shares for RSUs (in shares)   361,608    
Proceeds from contributions to the ESPP 121,692   121,692  
Issuance of shares in an at-the-market ("ATM")offering, net of issuance costs 3,007,058 $ 10 3,007,048  
Issuance of shares in an at-the-market ("ATM") offering, net of issuance costs (in shares)   1,016,026    
Net loss (7,556,837)     (7,556,837)
Ending balance at Sep. 30, 2020 19,042,028 $ 431 306,541,496 (287,499,899)
Ending balance (in shares) at Sep. 30, 2020   43,062,944    
Beginning balance at Dec. 31, 2020 49,052,506 $ 614 344,024,638 (294,972,746)
Beginning balance (in shares) at Dec. 31, 2020   61,292,412    
Stock-based compensation - restricted stock units ("RSUs") 2,088,910   2,088,910  
Stock-based compensation - employee stock purchase plan ("ESPP") 57,316   57,316  
Issuance of shares for RSUs   $ 6 (6)  
Issuance of shares for RSUs (in shares)   627,412    
Proceeds from contributions to the ESPP 117,013   117,013  
Net loss (8,525,763)     (8,525,763)
Ending balance at Mar. 31, 2021 42,789,982 $ 620 346,287,871 (303,498,509)
Ending balance (in shares) at Mar. 31, 2021   61,919,824    
Beginning balance at Dec. 31, 2020 49,052,506 $ 614 344,024,638 (294,972,746)
Beginning balance (in shares) at Dec. 31, 2020   61,292,412    
Net loss (32,006,118)      
Ending balance at Sep. 30, 2021 25,999,525 $ 633 352,977,756 (326,978,864)
Ending balance (in shares) at Sep. 30, 2021   63,155,272    
Beginning balance at Mar. 31, 2021 42,789,982 $ 620 346,287,871 (303,498,509)
Beginning balance (in shares) at Mar. 31, 2021   61,919,824    
Stock-based compensation - restricted stock units ("RSUs") 1,471,826   1,471,826  
Stock-based compensation - performance share units ("PSUs") 2,695,847   2,695,847  
Stock-based compensation - employee stock purchase plan ("ESPP") 60,651   60,651  
Issuance of shares for RSUs   $ 3 (3)  
Issuance of shares for RSUs (in shares)   298,641    
Issuance of shares for PSUs   $ 5 (5)  
Issuance of shares for PSUs (in shares)   494,608    
Proceeds from contributions to the ESPP 120,234 $ 2 120,232  
Proceeds from contributions to the ESPP (in shares)   155,064    
Net loss (11,015,829)     (11,015,829)
Ending balance at Jun. 30, 2021 36,122,711 $ 630 350,636,419 (314,514,338)
Ending balance (in shares) at Jun. 30, 2021   62,868,137    
Stock-based compensation - stock options 284,994   284,994  
Stock-based compensation - restricted stock units ("RSUs") 1,010,990   1,010,990  
Stock-based compensation - performance share units ("PSUs") 843,741   843,741  
Stock-based compensation - employee stock purchase plan ("ESPP") 76,814   76,814  
Issuance of shares for RSUs   $ 3 (3)  
Issuance of shares for RSUs (in shares)   287,135    
Proceeds from contributions to the ESPP 124,801   124,801  
Net loss (12,464,526)     (12,464,526)
Ending balance at Sep. 30, 2021 $ 25,999,525 $ 633 $ 352,977,756 $ (326,978,864)
Ending balance (in shares) at Sep. 30, 2021   63,155,272