v3.25.3

Property and Equipment, Net - Schedule of Property and Equipment (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Property, Plant and Equipment [Line Items]
Total	$ 101,724	$ 63,955
Less: Accumulated depreciation	(16,839)	(12,833)
Property and equipment, net	84,885	51,122
Land
Property, Plant and Equipment [Line Items]
Total	7,245	7,245
Lab equipment
Property, Plant and Equipment [Line Items]
Total	31,767	23,633
Leasehold improvements
Property, Plant and Equipment [Line Items]
Total	14,810	14,616
Computer equipment
Property, Plant and Equipment [Line Items]
Total	5,542	5,306
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Total	3,550	3,541
Construction-in-progress
Property, Plant and Equipment [Line Items]
Total	$ 38,810	$ 9,614

Amount of accumulated depreciation and amortization from plant, property, and equipment and right-of-use asset from finance lease.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 360
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482099/360-10-50-1

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
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-Publisher FASB
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Amount, after accumulated depreciation and amortization, of property, plant, and equipment and finance lease right-of-use asset.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 360
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482099/360-10-50-1

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 360
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
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-Subparagraph (b)
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+ References

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CASTLE BIOSCIENCES INC 10-Q