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Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands | Class A Preferred Stock Preferred Stock | Class A Preferred Stock | Class A Common Shares Common Shares | Class A Common Shares | Common Shares Common Shares | Common Shares | Common Stock Issuable | Additional Paid-in Capital | Accumulated Deficit | Total
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Balances at Dec. 31, 2021 |  |  |  |  | $ 9 |  | $ 4,329 | $ 359,906 | $ (251,844) | $ 112,400
Balances (in shares) at Dec. 31, 2021 | 250,000 |  | 845,385 |  | 6,238,866 |  |  |  |  |
Issuance of common shares - Founders Agreement |  |  |  |  |  |  | (4,212) | 4,212 |  |
Issuance of common shares - Founders Agreement (in shares) |  |  |  |  | 169,107 |  |  |  |  |
Issuance of common shares, net of offering costs - At-the-Market Offering |  |  |  |  | $ 2 |  |  | 6,498 |  | 6,500
Issuance of common shares, net of offering costs - At-the-Market Offering (in shares) |  |  |  |  | 525,206 |  |  |  |  |
Issuance of common shares - Equity fee on At-the-Market Offering |  |  |  |  |  |  | (113) | 279 |  | 166
Issuance of common shares - Equity fee on At-the-Market Offering (in shares) |  |  |  |  | 16,084 |  |  |  |  |
Issuance of common shares under ESPP |  |  |  |  |  |  |  | 206 |  | 206
Issuance of common shares under ESPP (in shares) |  |  |  |  | 22,056 |  |  |  |  |
Stock-based compensation expenses |  |  |  |  |  |  |  | 1,810 |  | 1,810
Stock-based compensation expenses (in shares) |  |  |  |  | 60,204 |  |  |  |  |
Issuance of common shares - Equity fee on RWG Debt |  |  |  |  |  |  |  | 750 |  | 750
Issuance of common shares - Equity fee on RWG Debt (in shares) |  |  |  |  | 63,662 |  |  |  |  |
Issuance of warrants for RWG Debt |  |  |  |  |  |  |  | 384 |  | 384
Net loss |  |  |  |  |  |  |  |  | (57,891) | (57,891)
Balances at Sep. 30, 2022 |  |  |  |  | $ 11 |  | 4 | 374,045 | (309,735) | 64,325
Balances (in shares) at Sep. 30, 2022 | 250,000 | 250,000 | 845,385 | 845,385 | 7,095,185 | 7,095,185 |  |  |  |
Balances at Jun. 30, 2022 |  |  |  |  | $ 10 |  | 28 | 372,708 | (290,738) | 82,008
Balances (in shares) at Jun. 30, 2022 |  | 250,000 |  | 845,385 |  | 6,967,413 |  |  |  |
Issuance of common shares, net of offering costs - At-the-Market Offering |  |  |  |  |  |  |  | 709 |  | 709
Issuance of common shares, net of offering costs - At-the-Market Offering (in shares) |  |  |  |  |  | 75,001 |  |  |  |
Issuance of common shares - Equity fee on At-the-Market Offering |  |  |  |  | 1 |  | (24) | 42 |  | 19
Issuance of common shares - Equity fee on At-the-Market Offering (in shares) |  |  |  |  |  | 4,179 |  |  |  |
Issuance of common shares under ESPP |  |  |  |  |  |  |  | 90 |  | 90
Issuance of common shares under ESPP (in shares) |  |  |  |  |  | 11,570 |  |  |  |
Stock-based compensation expenses |  |  |  |  |  |  |  | 496 |  | 496
Stock-based compensation expenses (in shares) |  |  |  |  |  | 37,022 |  |  |  |
Net loss |  |  |  |  |  |  |  |  | (18,997) | (18,997)
Balances at Sep. 30, 2022 |  |  |  |  | $ 11 |  | 4 | 374,045 | (309,735) | 64,325
Balances (in shares) at Sep. 30, 2022 | 250,000 | 250,000 | 845,385 | 845,385 | 7,095,185 | 7,095,185 |  |  |  |
Balances at Dec. 31, 2022 |  |  |  |  | $ 11 |  | 1,109 | 374,522 | (329,369) | 46,273
Balances (in shares) at Dec. 31, 2022 | 250,000 |  | 845,385 |  | 7,100,111 |  |  |  |  |
Issuance of common shares - Founders Agreement |  |  |  |  |  |  | (1,109) | 1,109 |  |
Issuance of common shares - Founders Agreement (in shares) |  |  |  |  | 187,134 |  |  |  |  |
Issuance of common shares, net of offering costs - At-the-Market Offering |  |  |  |  |  |  |  | 160 |  | 160
Issuance of common shares, net of offering costs - At-the-Market Offering (in shares) |  |  |  |  | 51,880 |  |  |  |  |
Issuance of common shares - Equity fee on At-the-Market Offering |  |  |  |  |  |  | 4 |  |  | 4
Issuance of common shares under ESPP |  |  |  |  |  |  |  | 178 |  | $ 178
Issuance of common shares under ESPP (in shares) |  |  |  |  | 47,511 |  |  |  |  | 86,578
Stock-based compensation expenses |  |  |  |  |  |  |  | 380 |  | $ 380
Stock-based compensation expenses (in shares) |  |  |  |  | 65,919 |  |  |  |  |
Fractional share adjsutment |  |  |  |  | (1,633) |  |  |  |  |
Exercise of warrants (in shares) |  |  |  |  | 93 |  |  |  |  |
Reverse Split (15:1) |  |  |  |  | $ (10) |  |  | 10 |  |
Net loss |  |  |  |  |  |  |  |  | (42,986) | (42,986)
Balances at Sep. 30, 2023 |  |  |  |  | $ 1 |  | 4 | 376,359 | (372,355) | 4,009
Balances (in shares) at Sep. 30, 2023 | 250,000 | 250,000 | 845,385 | 845,385 | 7,451,015 | 7,451,015 |  |  |  |
Balances at Jun. 30, 2023 |  |  |  |  | $ 1 |  |  | 376,009 | (362,297) | 13,713
Balances (in shares) at Jun. 30, 2023 |  | 250,000 |  | 845,385 |  | 7,320,444 |  |  |  |
Issuance of common shares, net of offering costs - At-the-Market Offering |  |  |  |  |  |  |  | 160 |  | 160
Issuance of common shares, net of offering costs - At-the-Market Offering (in shares) |  |  |  |  |  | 51,880 |  |  |  |
Issuance of common shares - Equity fee on At-the-Market Offering |  |  |  |  |  |  | 4 |  |  | 4
Issuance of common shares under ESPP |  |  |  |  |  |  |  | 90 |  | 90
Issuance of common shares under ESPP (in shares) |  |  |  |  |  | 34,869 |  |  |  |
Stock-based compensation expenses |  |  |  |  |  |  |  | 100 |  | 100
Stock-based compensation expenses (in shares) |  |  |  |  |  | 43,822 |  |  |  |
Net loss |  |  |  |  |  |  |  |  | (10,058) | (10,058)
Balances at Sep. 30, 2023 |  |  |  |  | $ 1 |  | $ 4 | $ 376,359 | $ (372,355) | $ 4,009
Balances (in shares) at Sep. 30, 2023 | 250,000 | 250,000 | 845,385 | 845,385 | 7,451,015 | 7,451,015 |  |  |  |

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