XML 59 R48.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Shareholders' equity - Underwritten public offering and Registered direct offering (Details) - USD ($) |  | 9 Months Ended
--- | --- | ---
Sep. 07, 2018 | Sep. 30, 2018 | Sep. 30, 2017
Stockholders' equity |  |  |
Proceeds from issuance of common stock |  | $ 99,653,000 | $ 103,167,000
Common stock |  |  |
Stockholders' equity |  |  |
Stock offering expenses |  | $ 347,000 | $ 4,774,000
Matrix Capital Management Company L P, New Enterprise Associates 16, L.P. New Enterprise Associates 14, L.P. and Syncona Portfolio Limited |  |  |
Stockholders' equity |  |  |
Issuance of shares represented by American Depositary Shares (in ADSs) | 10,000,000 |  |
Share price per ADS (in dollars per share) | $ 10.00 |  |
Matrix Capital Management Company L P, New Enterprise Associates 16, L.P. New Enterprise Associates 14, L.P. and Syncona Portfolio Limited | Common stock |  |  |
Stockholders' equity |  |  |
Issuance of common stock (in shares) | 60,000,000 |  |
Proceeds from issuance of common stock | $ 99,653,000 |  |
Stock offering expenses | $ 347,000 |  |

X
- Definition Number of American Depositary Shares representing shares issued during the period. + References No definition available. + Details
Name: | adap_StockIssuedDuringPeriodRepresentedByAmericanDepositarySharesNewIssues
Namespace Prefix: | adap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition The cash outflow for cost incurred directly with the issuance of an equity security. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3291-108585 + Details
Name: | us-gaap_PaymentsOfStockIssuanceCosts
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The cash inflow from the additional capital contribution to the entity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3255-108585 + Details
Name: | us-gaap_ProceedsFromIssuanceOfCommonStock
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_ProceedsFromIssuanceOrSaleOfEquityAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Price of a single share of a number of saleable stocks of a company. + References No definition available. + Details
Name: | us-gaap_SharePrice
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of new stock issued during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_StockIssuedDuringPeriodSharesNewIssues
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_StatementEquityComponentsAxis=us-gaap_CommonStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_CounterpartyNameAxis=adap_MatrixCapitalManagementCompanyLPNewEnterpriseAssociates16L.p.NewEnterpriseAssociates14L.p.AndSynconaPortfolioLimitedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |