Organization - Additional Information (Details) - USD ($) $ in Thousands	Jul. 03, 2025	Jun. 30, 2025	Mar. 31, 2025	Dec. 31, 2024	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023
Cash, cash equivalents and restricted cash		$ 2,879		$ 1,091	$ 2,464		$ 6,062
Accumulated deficit		$ 922,570		$ 920,446
Common stock, shares outstanding		2,074,746		1,601,252
Common stock, shares authorized		50,000,000		50,000,000
Minimum required amount of stockholder equity				$ 2,500
Total stockholders' equity		$ 3,661	$ 1,058	2,063	3,771	$ 4,798	6,307
Maximum [Member] | Subsequent Event [Member]
Common stock, shares authorized	50,000,000
Maximum [Member] | 2020 Equity Incentive Plan [Member] | Subsequent Event [Member]
Common stock, shares authorized	1,130,745
Minimum [Member] | Subsequent Event [Member]
Common stock, shares authorized	5,000,000
Minimum [Member] | 2020 Equity Incentive Plan [Member] | Subsequent Event [Member]
Common stock, shares authorized	130,745
Common Stock [Member]
Common stock, shares outstanding		2,074,746
Common stock reserved for future issuance		337,081
Total stockholders' equity		$ 2	$ 2	$ 2	$ 2	$ 2	$ 2
Series A - 1 Preferred Stock [Member]
Common stock, shares outstanding		500
Series A - 2 Preferred Stock [Member]
Common stock, shares outstanding		850