Leases (Narrative) (Details)		1 Months Ended			3 Months Ended
	Mar. 17, 2026 USD ($) ft²	Mar. 31, 2026 USD ($)	Jan. 31, 2026 USD ($) item	Dec. 31, 2025 USD ($) ft²	Mar. 31, 2026 USD ($)	Mar. 31, 2025 USD ($)	Sep. 30, 2025 USD ($) ft²	Jul. 31, 2025 USD ($) ft²	Nov. 30, 2024 item	Oct. 31, 2024 USD ($) ft²	Apr. 30, 2024 USD ($)	Aug. 21, 2021 USD ($) ft²
Lessee, Lease, Description [Line Items]
Asset impairment charge					$ 7,482,000
ROU asset impairment					7,400,000
Impairment of leasehold improvements					136,000
Lease liability		$ 26,349,000			26,349,000
Operating lease right-of-use assets		14,407,000		$ 17,488,000	14,407,000
Number of options | item			2
Cash paid for amounts included in measurement of operating lease liabilities					1,500,000	$ 1,400,000
Mountain View, California [Member]
Lessee, Lease, Description [Line Items]
Rentable area (in square feet) | ft²												61,000
Letter of credit provided in place of security deposit		$ 800,000			800,000							$ 4,300,000
Sublease, initial occupancy percentage		52.00%
Santa Rosa, California [Member]
Lessee, Lease, Description [Line Items]
Rentable area (in square feet) | ft²										4,000
Leases, initial term (in months)										29 months
Security deposit										$ 8,000
Lease liability										169,000
Operating lease right-of-use assets										$ 169,000
San Francisco, California [Member]
Lessee, Lease, Description [Line Items]
Rentable area (in square feet) | ft²	5,018							8,100
Leases, initial term (in months)	51 months							39 months
Security deposit	$ 62,000							$ 90,000
Lease liability								1,254,000
Operating lease right-of-use assets								$ 1,254,000
Average monthly payment	47,400
Monthly payment, amended lease term	$ 26,500
Rohnert Park, California [Member]
Lessee, Lease, Description [Line Items]
Rentable area (in square feet) | ft²				13,100
Tenant improvement allowance				$ 173,000
Leases, initial term (in months)				63 months
Security deposit				$ 39,000
Lease liability				2,800,000
Operating lease right-of-use assets				$ 2,800,000
Austin, Texas [Member]
Lessee, Lease, Description [Line Items]
Rentable area (in square feet) | ft²							26,000
Tenant improvement allowance			$ 71,000
Leases, initial term (in months)			51 months				12 months
Security deposit		$ 150,000			150,000
Lease liability			$ 2,500,000				$ 561,000
Operating lease right-of-use assets			$ 2,500,000				$ 561,000
Renewal term			3 years
Tokyo, Japan [Member]
Lessee, Lease, Description [Line Items]
Lease liability											$ 420,000
Operating lease right-of-use assets											$ 420,000
Renewal term											3 years
Number of contracts | item									1
Minimum [Member] | Mountain View, California [Member]
Lessee, Lease, Description [Line Items]
Sublease, annual base rent		1,200,000			1,200,000
Maximum [Member] | Mountain View, California [Member]
Lessee, Lease, Description [Line Items]
Sublease, annual base rent		$ 2,400,000			$ 2,400,000