| Document and Entity Information | Jul. 30, 2021 |
| Document Information [Line Items] | |
| Document Type | 8-K/A |
| Amendment Flag | true |
| Document Period End Date | Jul. 30, 2021 |
| Entity Registrant Name | ALPHA PARTNERS TECHNOLOGY MERGER CORP. |
| Entity Incorporation, State or Country Code | E9 |
| Entity File Number | 001-40677 |
| Entity Tax Identification Number | 98-1581691 |
| Entity Address, Address Line One | Empire State Building |
| Entity Address, Address Line Two | 20 West 34th Street, Suite 4215 |
| Entity Address, City or Town | New York |
| Entity Address, State or Province | NY |
| Entity Address, Postal Zip Code | 10001 |
| City Area Code | 212 |
| Local Phone Number | 906-4480 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | false |
| Amendment Description | Alpha Partners Technology Merger Corp. (the “Company”) is filing this Form 8-K/A (this “Amendment”) to amend and restate its auditedbalance sheet as of July 30, 2021 filed as Exhibit 99.1 to the Company’s Current Report on Form 8-K, originally filed with the Securities and Exchange Commission (the “SEC”) on August 5, 2021 (the “Original Form 8-K”) on account of the restatement of the Company’s financial statement and related footnote disclosures as of July 30, 2021. |
| Entity Central Index Key | 0001845550 |
| Common Class A [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Class A ordinary shares included as part of the Units, par value $0.0001 per share |
| Trading Symbol | APTM |
| Security Exchange Name | NASDAQ |
| Warrant [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Redeemable warrants, each whole warrant exercisable for one Class A ordinary share at an exercise price of $11.50 |
| Trading Symbol | APTMW |
| Security Exchange Name | NASDAQ |
| Capital Units [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Units, each consisting of one Class A ordinary share andone-thirdof one redeemable warrant to acquire one Class A ordinary share |
| Trading Symbol | APTMU |
| Security Exchange Name | NASDAQ |
