Organization - Additional Information (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025	Mar. 31, 2025	Dec. 31, 2024
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Cash, cash equivalents and restricted cash	$ 354	$ 1,385	$ 319	$ 1,091
Accumulated deficit	$ 925,628	$ 924,622
Common stock, shares outstanding	2,378,383	2,349,480
Common stock, shares authorized	50,000,000	50,000,000
Minimum required amount of stockholder equity		$ 2,500
Total stockholders' equity	$ 1,288	2,153	1,058	2,063
2020 Equity Incentive Plan [Member]
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Common stock, shares authorized	955,333
Common Stock [Member]
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Common stock, shares outstanding	2,378,383
Common stock reserved for future issuance	327,098
Total stockholders' equity	$ 2	$ 2	$ 2	$ 2
Series A - 1 Preferred Stock [Member]
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Common stock, shares outstanding	500
Series A - 2 Preferred Stock [Member]
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Common stock, shares outstanding	850