Annual report pursuant to Section 13 and 15(d)

STATEMENTS OF STOCKHOLDERS' EQUITY

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STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($)
Common Stock [Member]
Common Stock Issuable [Member]
Additional Paid-in Capital [Member]
Accumulated Deficit [Member]
Common Class A [Member]
Total
Balances at Dec. 31, 2017 $ 2,000 $ 2,296,000 $ 71,772,000 $ (59,030,000) $ 1,000 $ 15,041,000
Balances (in Shares) at Dec. 31, 2017 18,512,429       7,000,000  
Issuance of common shares, net of offering costs - Public offering $ 1,000 0 20,827,000 0 $ 0 20,828,000
Issuance of common shares, net of offering costs - Public offering (in Shares) 5,290,000       0  
Issuance of common shares, net of offering costs - At-the-market offering $ 0 0 7,747,000 0 $ 0 7,747,000
Issuance of common shares, net of offering costs - At-the-market offering (in Shares) 1,841,774       0  
Stock-based compensation expense $ 0 0 1,994,000 0 $ 0 1,994,000
Stock-based compensation expense (in Shares) 616,240       0  
Issuance of common shares - Founders Agreement $ 0 (2,296,000) 3,111,000 0 $ 0 815,000
Issuance of common shares - Founders Agreement (in Shares) 770,128       0  
Common shares issuable - Founders Agreement $ 0 1,748,000 0 0 $ 0 1,748,000
Common shares issuable - Founders Agreement (in Shares) 0       0  
Exercise of warrants $ 0 0 0 0 $ 0 0
Exercise of warrants (in Shares) 45,583       0  
Net loss $ 0 0 0 (36,367,000) $ 0 (36,367,000)
Balances at Dec. 31, 2018 $ 3,000 1,748,000 105,451,000 (95,397,000) $ 1,000 11,806,000
Balances (in Shares) at Dec. 31, 2018 27,076,154       7,000,000  
Issuance of common shares, net of offering costs - Public offering $ 2,000 0 17,571,000 0 $ 0 17,573,000
Issuance of common shares, net of offering costs - Public offering (in Shares) 15,400,000       0  
Issuance of common shares, net of offering costs - At-the-market offering $ 0 0 7,813,000 0 $ 0 7,813,000
Issuance of common shares, net of offering costs - At-the-market offering (in Shares) 2,273,189       0  
Stock-based compensation expense $ 0 0 3,121,000 0 $ 0 3,121,000
Stock-based compensation expense (in Shares) 779,652       0  
Issuance of common shares - Founders Agreement $ 0 (1,748,000) 2,486,000 0 $ 0 738,000
Issuance of common shares - Founders Agreement (in Shares) 1,402,244       0  
Common shares issuable - Founders Agreement $ 0 2,510,000 0 0 $ 0 2,510,000
Common shares issuable - Founders Agreement (in Shares) 0       0  
Exercise of warrants $ 0 0 0 0 $ 0 0
Exercise of warrants (in Shares) 73,525       0  
Net loss $ 0 0 0 (24,714,000) $ 0 (24,714,000)
Balances at Dec. 31, 2019 $ 5,000 $ 2,510,000 $ 136,442,000 $ (120,111,000) $ 1,000 $ 18,847,000
Balances (in Shares) at Dec. 31, 2019 47,004,764       7,000,000