Summary of Significant Accounting Policies - Narrative (Details)		3 Months Ended			9 Months Ended		12 Months Ended
	Aug. 12, 2021 USD ($)	Sep. 30, 2024 USD ($) $ / shares shares	Sep. 30, 2023 USD ($)	Mar. 31, 2023 USD ($)	Sep. 30, 2024 USD ($) segment $ / shares shares	Sep. 30, 2023 USD ($)	Dec. 31, 2023 USD ($)	Mar. 04, 2024	Jan. 12, 2024 $ / shares
Cash and Cash Equivalents [Line Items]
Restricted cash, non-current		$ 500,000			$ 500,000		$ 373,000
Deferred fulfillment and prepaid launch costs		1,000,000.0			1,000,000.0		1,700,000
Contract with customer, cumulative catch-up to revenue		100,000	$ 0		1,800,000	$ 0
Contract with customer, liability		1,600,000			1,600,000		1,000,000.0
Contract liabilities, non-current		1,143,000			1,143,000		998,000
Service revenue		$ 107,000	$ 339,000		$ 1,829,000	2,066,000
Contract with customer, liability							35,000
Warrants and rights outstanding, term (in years)		5 years			5 years			5 years	5 years
Payment of liability				$ 10,000,000
Exercise price (in dollars per share) | $ / shares									$ 0.96
Issuance of pre-funded warrants and warrants in private placement, net of issuance costs		$ 2,443,000
Estimated fair value of warrants		$ 3,000			$ 3,000		3,000
Impairments of long-lived assets					0	$ 0
Defined contribution plan, cost					$ 0
Number of reportable segments | segment					1
Number of operating segments | segment					1
Revenue from Contract with Customer Benchmark | Geographic Concentration Risk | Geographic Distribution, Domestic
Cash and Cash Equivalents [Line Items]
Percentage of derived from customers					98.10%
Revenue from Contract with Customer Benchmark | Geographic Concentration Risk | Geographic Distribution, Foreign
Cash and Cash Equivalents [Line Items]
Percentage of derived from customers					1.90%
Restricted Stock Units
Cash and Cash Equivalents [Line Items]
Expected term					6 months
ESPP
Cash and Cash Equivalents [Line Items]
Offering period					6 months
Common Class A
Cash and Cash Equivalents [Line Items]
Exchange ratio		1			1
Exercise price (in dollars per share) | $ / shares		$ 575.00			$ 575.00
Expiration period					5 years
Private Placement Warrant
Cash and Cash Equivalents [Line Items]
Number of warrants outstanding (in shares) | shares		225,450			225,450
Estimated fair value of warrants	$ 31,200,000
Public Warrant
Cash and Cash Equivalents [Line Items]
Number of warrants outstanding (in shares) | shares		172,500			172,500
Issuance of pre-funded warrants and warrants in private placement, net of issuance costs	$ 20,200,000
Patents
Cash and Cash Equivalents [Line Items]
Intangible asset useful life		10 years			10 years
Prepaid Expenses and Other Current Assets
Cash and Cash Equivalents [Line Items]
Deferred fulfillment and prepaid launch costs		$ 0			$ 0		1,300,000
Other Noncurrent Assets
Cash and Cash Equivalents [Line Items]
Deferred fulfillment and prepaid launch costs		1,000,000.0			1,000,000.0		400,000
Cash Designated for Collateral
Cash and Cash Equivalents [Line Items]
Restricted cash, non-current		$ 500,000			$ 500,000		$ 400,000