XML 32 R22.htm IDEA: XBRL DOCUMENT
v3.22.0.1

Accounting Policies (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2021
Accounting Policies [Abstract] |
Summary of Depreciation on Property and Equipment | Depreciation is recorded on a straight-line basis over the following periods:
Computer equipment |  | 3 years
Furniture and fixtures |  | 5 years
Machinery and equipment |  | 5 - 10 years
Leasehold improvements and equipment under capital lease |  | Over the term of the lease

X
- Definition Schedule of property plant and equipment estimated useful life. + References No definition available. + Details
Name: | achv_ScheduleOfPropertyPlantAndEquipmentEstimatedUsefulLifeTableTextBlock
Namespace Prefix: | achv_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

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