| Cover | Aug. 22, 2022 |
| Document Information [Line Items] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Aug. 22, 2022 |
| Entity File Number | 001-40720 |
| Entity Registrant Name | AVISTA PUBLIC ACQUISITION CORP. II |
| Entity Central Index Key | 0001846253 |
| Entity Tax Identification Number | 98-1584818 |
| Entity Incorporation, State or Country Code | E9 |
| Entity Address, Address Line One | 65 East 55th Street |
| Entity Address, Address Line Two | 18th Floor |
| Entity Address, City or Town | New York |
| Entity Address, State or Province | NY |
| Entity Address, Postal Zip Code | 10022 |
| City Area Code | 212 |
| Local Phone Number | 593-6900 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | true |
| Elected Not To Use the Extended Transition Period | false |
| Units, each consisting of one share of Class A ordinary share and one-third of one redeemable warrant [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Units, each consisting of one Class A ordinary share and one-third of one redeemable warrant |
| Trading Symbol | AHPAU |
| Security Exchange Name | NASDAQ |
| Common Class A [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Class A ordinary shares, par value $0.0001 per share |
| Trading Symbol | AHPA |
| Security Exchange Name | NASDAQ |
| Redeemable warrants, each whole warrant exercisable for one Class A ordinary share at an exercise price of $11.50 per share [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 per share |
| Trading Symbol | AHPAW |
| Security Exchange Name | NASDAQ |
