XML 28 R21.htm IDEA: XBRL DOCUMENT
v3.25.1

Commitments and Contingencies (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2025
Operating Leased Assets [Line Items] |
Summary of Contractual Obligations | The following table summarizes our contractual obligations as of March 31, 2025 (in thousands):
|  | Total |  |  | Less than 1 year |  |  | 1-3 years |  |  | 3-5 years |  |  | More than 5 years |
Vancouver office operating lease |  | $ | 115 |  |  | $ | 47 |  |  | $ | 68 |  |  | $ | — |  |  | $ | — |
Total |  | $ | 115 |  |  | $ | 47 |  |  | $ | 68 |  |  | $ | — |  |  | $ | — |
Summary of Other Information Related to Leases | Other information related to leases was as follows:
| Three Months Ended |  |
| March 31, |  |
| 2025 |  |  | 2024 |  |
Supplemental Cash Flow Information |  |  |  |  |  |
Cash paid for amounts included in the measurement of lease liabilities: |  |  |  |  |  |
Operating cash flows to operating leases | $ | 13 |  |  | $ | 16 |  |
Right-of-use assets obtained in exchange for lease obligations: |  |  |  |  |  |
Operating leases |  | — |  |  |  | — |  |
Weighted Average Remaining Lease Term |  |  |  |  |  |
Operating leases | 1.83 years |  |  | 0.83 years |  |
Weighted Average Discount Rate |  |  |  |  |  |
Operating leases |  | 8.98 | % |  |  | 8.98 | % |

X
- Definition Schedule of supplemental cash flows information related to leases. + References No definition available. + Details
Name: | achv_ScheduleOfSupplementalCashFlowsInformationRelatedToLeasesTableTextBlock
Namespace Prefix: | achv_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of contractual obligation by timing of payment due. Includes, but is not limited to, long-term debt obligation, lease obligation, and purchase obligation. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name Regulation S-X (SX) -Number 210 -Section 12 -Subsection 04 -Subparagraph (a) -Publisher SEC Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04(a)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480678/235-10-S99-3 + Details
Name: | srt_ContractualObligationFiscalYearMaturityScheduleTableTextBlock
Namespace Prefix: | srt_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

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