XML 48 R37.htm IDEA: XBRL DOCUMENT
v3.20.2

Commitments and Contingencies - Summary of Contractual Obligations (Detail) $ in Thousands | Jun. 30, 2020 USD ($)
--- | ---
Contractual Obligation Fiscal Year Maturity Schedule [Line Items] |
Total | $ 262
Less than 1 year | 105
1-3 years | 152
3-5 years | 5
Vancouver Office Operating Lease [Member] |
Contractual Obligation Fiscal Year Maturity Schedule [Line Items] |
Total | 163
Less than 1 year | 31
1-3 years | 127
3-5 years | 5
Seattle Office Operating Lease [Member] |
Contractual Obligation Fiscal Year Maturity Schedule [Line Items] |
Total | 99
Less than 1 year | 74
1-3 years | $ 25

X
- Definition Contractual obligation fiscal year maturity schedule. + References No definition available. + Details
Name: | achv_ContractualObligationFiscalYearMaturityScheduleLineItems
Namespace Prefix: | achv_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of contractual obligation, including but not limited to, long-term debt, capital lease obligations, operating lease obligations, purchase obligations, and other commitments. + References No definition available. + Details
Name: | us-gaap_ContractualObligation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of contractual obligation to be paid in fourth and fifth fiscal years following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References No definition available. + Details
Name: | us-gaap_ContractualObligationDueInFourthAndFifthYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of contractual obligation to be paid in second and third fiscal years following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References No definition available. + Details
Name: | us-gaap_ContractualObligationDueInSecondAndThirdYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of contractual obligation to be paid in remainder of current fiscal year. + References No definition available. + Details
Name: | us-gaap_ContractualObligationFutureMinimumPaymentsDueRemainderOfFiscalYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_TypeOfArrangementAxis=achv_VancouverOfficeOperatingLeaseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TypeOfArrangementAxis=achv_SeattleOfficeOperatingLeaseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |