Adaptimmune Quarterly report pursuant to Section 13 or 15(d)

Quarterly report pursuant to Section 13 or 15(d)

Cover
- Document and Entity Information
Financial Statements
Notes to Financial Statements
Accounting Policies
- Summary of Significant Accounting Policies (Policies)
Notes Tables
Notes Details
Uncategorized
- Pay vs Performance Disclosure
- Insider Trading Arrangements

Marketable securities - Available-for-sale debt securities (Details)

v3.23.3

Marketable securities - Available-for-sale debt securities (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2023 USD ($)
Debt Securities
Marketable securities
Amortized cost	$ 71,588
Gross unrealized gains	94
Gross unrealized losses	(13)
Aggregate estimated fair value	71,669
Cash equivalents
Marketable securities
Amortized cost	7,978
Gross unrealized gains	1
Aggregate estimated fair value	7,979
Corporate Debt Securities Maturity Period Less Than Three Months \| Debt Securities
Marketable securities
Amortized cost	8,824
Gross unrealized losses	(7)
Aggregate estimated fair value	8,817
U.S. Treasury Securities Maturity Period Less Than Three Months
Marketable securities
Amortized cost	59,780
Gross unrealized gains	94
Gross unrealized losses	(3)
Aggregate estimated fair value	59,871
U.S. Treasury Securities Maturity Period Less Than Three Months \| Cash equivalents
Marketable securities
Amortized cost	7,978
Gross unrealized gains	1
Aggregate estimated fair value	7,979
Agency Bond Maturity Period Less Than Three Months
Marketable securities
Amortized cost	2,984
Gross unrealized losses	(3)
Aggregate estimated fair value	$ 2,981
Maximum \| Corporate Debt Securities Maturity Period Less Than Three Months \| Debt Securities
Marketable securities
Available For Sale Securities Debt Maturity Period	3 months
Maximum \| U.S. Treasury Securities Maturity Period Less Than Three Months
Marketable securities
Available For Sale Securities Debt Maturity Period	3 months
Maximum \| U.S. Treasury Securities Maturity Period Less Than Three Months \| Cash equivalents
Marketable securities
Available For Sale Securities Debt Maturity Period	3 months
Maximum \| Agency Bond Maturity Period Less Than Three Months
Marketable securities
Available For Sale Securities Debt Maturity Period	3 months

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