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Stockholders' Equity - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands |  |  |  |  | 12 Months Ended
--- | --- | --- | --- | --- | ---
Oct. 03, 2022 | Feb. 28, 2022 | Sep. 21, 2021 | Oct. 20, 2020 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |
Preferred stock share authorized |  |  |  |  | 50,000,000 |  |
Preferred stock share par value |  |  |  |  | $ 0.0001 |  |
Common stock, issued and sold |  | 3,880,000 |  |  |  |  |
Net proceeds from issuance of common stock and exercise of overallotment |  | $ 10,000 |  |  |  |  |
After deduction of underwriting discounts and estimated other offering expenses |  | $ 900 |  |  |  |  |
Proceeds from common stock issuance |  |  |  |  | $ 11,538 | $ 4,380 | $ 15,000
ATM Facility [Member] |  |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |
Common stock, issued and sold | 2,000,000 |  |  |  |  |  |
After deduction of underwriting discounts and estimated other offering expenses | $ 100 |  |  |  |  |  |
Common stock shares subscribed but not issued | 15,661,000 |  |  |  |  |  |
ATM Facility [Member] | Maximum [Member] |  |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |
Common stock shares subscribed but not issued | 15,661,000 |  |  |  |  |  |
Pre Funded Warrants [Member] |  |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |
Class of warrant or right, exercise price of warrants or rights |  | $ 0.0001 |  |  | $ 0 |  |
Pre Funded Warrants [Member] | Maximum [Member] |  |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |
Warrants issued (in shares) |  | 3,880,000 |  |  |  |  |
Common Warrants [Member] | Maximum [Member] |  |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |
Warrants issued (in shares) |  | 7,760,000 |  |  |  |  |
Common Stock Warrants [Member] |  |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |
Common Stock, Voting Rights |  | 4.99 |  |  |  |  |
Class of warrant or right, exercise price of warrants or rights |  | $ 1.41 |  |  | $ 1.41 |  |
Common Stock Warrants [Member] | Maximum [Member] |  |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |
Date from which Warrants or Rights Exercisable |  | Aug. 23, 2027 |  |  |  |  |
Common Stock Warrants [Member] | Minimum [Member] |  |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |
Date from which Warrants or Rights Exercisable |  | Aug. 23, 2022 |  |  |  |  |
Common Stock Warrants [Member] | ATM Facility [Member] |  |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |
Common stock, issued and sold |  |  | 1,400,000 |  |  |  |
Net proceeds from issuance of common stock and exercise of overallotment |  |  | $ 4,100 |  |  |  |
Follow-on Public Offering [Member] |  |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |
Common stock, issued and sold |  | 3,880,000 |  | 3,750,000 |  |  |
Common stock issued price per share |  | $ 1.41 |  | $ 4 |  |  |
Net proceeds from issuance of common stock and exercise of overallotment |  | $ 10,000 |  | $ 14,000 |  |  | $ 14,037
Underwriting discounts and commissions |  |  |  | $ 1,000 |  |  |
After deduction of underwriting discounts and estimated other offering expenses |  | $ 900 |  |  |  |  |
Follow-on Public Offering [Member] | Pre Funded Warrants [Member] |  |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |
Common stock issued price per share |  | $ 1.4099 |  |  |  |  |
Follow-on Public Offering [Member] | Pre Funded Warrants [Member] | Maximum [Member] |  |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |
Warrants issued (in shares) |  | 3,880,000 |  |  |  |  |
Follow-on Public Offering [Member] | Common Warrants [Member] | Maximum [Member] |  |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |
Warrants issued (in shares) |  | 7,760,000 |  |  |  |  |
Follow-on Public Offering [Member] | Cellectis [Member] |  |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |
Common stock, issued and sold |  |  |  | 1,250,000 |  |  |
Net proceeds from issuance of common stock and exercise of overallotment |  |  |  | $ 5,000 |  |  |
Proceeds from common stock issuance |  |  |  | $ 14,000 |  |  |

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