The amount of cash received for research and development tax credit .

No definition available.

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Balance Type:	debit
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- Definition

Per share price of new stock issued during the period.

+ References

No definition available.

+ Details

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- Definition

The threshold period after the issuance during which, if there is no effective registration statement registering the ADSs underlying the warrants, the warrants can be exercised on cashless basis.

+ References

No definition available.

+ Details

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- Definition

Exercise price per share or per unit of warrants or rights outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21475-112644

+ Details

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Balance Type:	na
Period Type:	instant

- Definition

Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- 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=121586364&loc=d3e3291-108585

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The cash inflow from the issuance of common stock, preferred stock, treasury stock, stock options, and other types of equity.

+ 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=121586364&loc=d3e3255-108585

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- 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=120391452&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=120397183&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=120391452&loc=d3e13212-122682

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Period between issuance and expiration of outstanding warrant and right embodying unconditional obligation requiring redemption by transferring asset at specified or determinable date or upon event certain to occur, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	na
Period Type:	instant

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ClassOfWarrantOrRightAxis=aktx_PlacementAgentWarrantsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

- Details

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Subsequent Events (Details) - USD ($)			1 Months Ended			6 Months Ended
Subsequent Events (Details) - USD ($)	Mar. 03, 2020	Feb. 28, 2020	Jul. 31, 2021	Jun. 30, 2020	Sep. 26, 2018	Jun. 30, 2021	Aug. 31, 2021	Feb. 21, 2020	Jul. 03, 2019
Subsequent Event [Line Items]
Aggregate ADSs issued (in shares)		5,620,296
Private Placement [Member]
Subsequent Event [Line Items]
Aggregate ADSs issued (in shares)		5,620,296
Gross proceeds		$ 9,500,000
Threshold period for exercise of warrants on cashless basis	6 months
Private Placement [Member] \| Investor Warrants [Member]
Subsequent Event [Line Items]
Warrants issued to purchase ADS (in shares)								2,810,136
Exercise price of warrants (in dollars per ADS)								$ 2.20	$ 3.00
Private Placement [Member] \| Placement Agent Warrants [Member]
Subsequent Event [Line Items]
Warrants issued to purchase ADS (in shares)	449,623
Term of the warrants	5 years
Exercise price of warrants (in dollars per ADS)	$ 2.55								$ 2.85
Placement agent fees and expenses	$ 808,362
Aspire Capital Fund LLC
Subsequent Event [Line Items]
Aggregate ADSs issued (in shares)					30,000,000
Gross proceeds				$ 30,000,000	$ 20,000,000	$ 2,000,001
Subsequent Event [Member]
Subsequent Event [Line Items]
Amount received for research and development tax credit in cash							$ 3,000,000
Subsequent Event [Member] \| Private Placement [Member]
Subsequent Event [Line Items]
Aggregate ADSs issued (in shares)			7,947,540
Gross proceeds			$ 12,300,000
Share issue price (in dollars per ADS)			$ 1.55
Placement agent fees and expenses			$ 933,000
Subsequent Event [Member] \| Private Placement [Member] \| Investor Warrants [Member]
Subsequent Event [Line Items]
Term of the warrants			5 years
Exercise price of warrants (in dollars per ADS)			$ 2.32
Threshold period for exercise of warrants on cashless basis			6 months
Subsequent Event [Member] \| Private Placement [Member] \| Placement Agent Warrants [Member]
Subsequent Event [Line Items]
Warrants issued to purchase ADS (in shares)			398,384