Organization, Restructuring, Going Concern and Basis of Presentation - Additional Information (Details) $ / shares in Units, $ in Thousands									2 Months Ended	3 Months Ended		6 Months Ended		12 Months Ended	15 Months Ended
	May 27, 2025	May 14, 2025	Mar. 13, 2025	Feb. 12, 2024 USD ($)	Nov. 15, 2023 USD ($)	Oct. 02, 2023 USD ($)	May 25, 2023 USD ($)	Apr. 13, 2022 USD ($)	Jun. 30, 2024 Employee	Jun. 30, 2025 USD ($) $ / shares shares	Jun. 30, 2024 USD ($)	Jun. 30, 2025 USD ($) Lease Employee $ / shares shares	Jun. 30, 2024 USD ($)	Dec. 31, 2024 USD ($) $ / shares	Jun. 30, 2025 USD ($) $ / shares	Jun. 26, 2025 $ / shares
Organization And Basis Of Presentation [Line Items]
Entity incorporation, date of incorporation												Nov. 21, 2005
Restructuring charge										$ 398	$ 6,450	$ 1,283	$ 6,450	$ 10,900	$ 12,200
Impairment charge for write-down of property and equipment												1,900
Impairment Of Right Of Use Asset										$ 0	$ 22,836	0	$ 22,836	$ 22,800
Fund raised for operations												429,800
Issuance of equity securities												4,300
Proceeds from repurchase of equity gross												$ 5,000
Reverse stock split, ratio										0.02
Common stock par value | $ / shares										$ 0.001		$ 0.001		$ 0.001	$ 0.001
Stock exchange stock trading description												From the May 28, 2025 date that the common stock began trading on a post-split basis on Nasdaq, the Company maintained a minimum bid price of $1.00 per common share in excess of 10 consecutive business days as required under the Bid Price Requirement, and, on June 13, 2025, Nasdaq notified the Company that it had regained compliance with the Bid Price Requirement.
Accumulated deficit										$ (420,774)		$ (420,774)		$ (404,790)	$ (420,774)
Cash and cash equivalents										$ 29,784		$ 29,784		$ 40,577	$ 29,784
Number of leased properties marketed for sublease arrangements | Lease												3
Purchase Agreement
Organization And Basis Of Presentation [Line Items]
Common stock par value | $ / shares																$ 0.001
Sales Agreement
Organization And Basis Of Presentation [Line Items]
Net proceeds				$ 4,800	$ 8,200	$ 10,900
Private Placement
Organization And Basis Of Presentation [Line Items]
Net proceeds from private placement								$ 96,300
Private Placement | Purchase Agreement
Organization And Basis Of Presentation [Line Items]
Net proceeds from private placement							$ 50,000
Net proceeds from issuance of preferred stock allocated to warrants							46,500
Private Placement | Pre Funded Warrants
Organization And Basis Of Presentation [Line Items]
Gross proceeds for warrant exercises								$ 21,100
Employee Severance
Organization And Basis Of Presentation [Line Items]
Number of employees reduced | Employee									87			87
Common Stock
Organization And Basis Of Presentation [Line Items]
Reverse stock split												As a result of the Reverse Stock Split, every 50 shares of the Company’s issued and outstanding common stock was automatically exchanged for one issued and outstanding share of common stock, without any change in the par value per share.
Reverse stock split, ratio	0.02	0.02	0.01
Reverse stock split shares issued | shares										48		1
Fractional shares issued | shares												0
Reduction of common stock fractional shares | shares												48
Authorized number of shares unchanged | shares												200,000,000
Net proceeds							$ 30,500