XML 56 R42.htm IDEA: XBRL DOCUMENT
v3.21.2

SHAREHOLDERS' EQUITY , WARRANT ACTIVITY (Details) | Sep. 30, 2021 $ / shares shares
--- | ---
Class of Warrant or Right [Line Items] |
Class of Warrant or Right, Outstanding | 1,882,518
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right | 539,508
PSP 1 Warrants |
Class of Warrant or Right [Line Items] |
Class of Warrant or Right, Outstanding | 928,127
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares | $ 31.61
US Treasury CARES Act Loan [Member] |
Class of Warrant or Right [Line Items] |
Class of Warrant or Right, Outstanding | 427,080
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares | $ 31.61
PSP 2 Warrants |
Class of Warrant or Right [Line Items] |
Class of Warrant or Right, Outstanding | 305,499
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares | $ 52.25
PSP 3 Warrants |
Class of Warrant or Right [Line Items] |
Class of Warrant or Right, Outstanding | 221,812
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares | $ 66.39

X
- 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=123467817&loc=d3e21475-112644 + Details
Name: | us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_ClassOfWarrantOrRightLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of securities into which each warrant or right may be converted. For example, but not limited to, each warrant may be converted into two shares. + References No definition available. + Details
Name: | us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of warrants or rights outstanding. + References No definition available. + Details
Name: | us-gaap_ClassOfWarrantOrRightOutstanding
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=alk_PSP1WarrantsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=alk_USTreasuryCARESActLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=alk_PSP2WarrantsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=alk_PSP3WarrantsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |