XML 15 R2.htm IDEA: XBRL DOCUMENT
v3.25.0.1

Document and Entity Information | 12 Months Ended
--- | ---
Dec. 31, 2024
Document and Entity Information [Abstract] |
Entity Central Index Key | 0000842517
Amendment Flag | false
Document Fiscal Year Focus | 2024
Document Fiscal Period Focus | FY
Auditor Firm ID | 263
Auditor Name | Rehmann Robson LLCRehmann Robson LLC
Auditor Location | Saginaw, Michigan

X
- Definition Boolean flag that is true when the XBRL content amends previously-filed or accepted submission. + References No definition available. + Details
Name: | dei_AmendmentFlag
Namespace Prefix: | dei_
Data Type: | xbrli:booleanItemType
Balance Type: | na
Period Type: | duration

X
- Definition PCAOB issued Audit Firm Identifier + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form 10-K -Number 249 -Section 310 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form 20-F -Number 249 -Section 220 -Subsection f Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form 40-F -Number 249 -Section 240 -Subsection f + Details
Name: | dei_AuditorFirmId
Namespace Prefix: | dei_
Data Type: | dei:nonemptySequenceNumberItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form 10-K -Number 249 -Section 310 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form 20-F -Number 249 -Section 220 -Subsection f Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form 40-F -Number 249 -Section 240 -Subsection f + Details
Name: | dei_AuditorLocation
Namespace Prefix: | dei_
Data Type: | dei:internationalNameItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form 10-K -Number 249 -Section 310 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form 20-F -Number 249 -Section 220 -Subsection f Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form 40-F -Number 249 -Section 240 -Subsection f + Details
Name: | dei_AuditorName
Namespace Prefix: | dei_
Data Type: | dei:internationalNameItemType
Balance Type: | na
Period Type: | duration

X
- Definition Fiscal period values are FY, Q1, Q2, and Q3. 1st, 2nd and 3rd quarter 10-Q or 10-QT statements have value Q1, Q2, and Q3 respectively, with 10-K, 10-KT or other fiscal year statements having FY. + References No definition available. + Details
Name: | dei_DocumentFiscalPeriodFocus
Namespace Prefix: | dei_
Data Type: | dei:fiscalPeriodItemType
Balance Type: | na
Period Type: | duration

X
- Definition This is focus fiscal year of the document report in YYYY format. For a 2006 annual report, which may also provide financial information from prior periods, fiscal 2006 should be given as the fiscal year focus. Example: 2006. + References No definition available. + Details
Name: | dei_DocumentFiscalYearFocus
Namespace Prefix: | dei_
Data Type: | xbrli:gYearItemType
Balance Type: | na
Period Type: | duration

X
- Definition A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Exchange Act -Number 240 -Section 12 -Subsection b-2 + Details
Name: | dei_EntityCentralIndexKey
Namespace Prefix: | dei_
Data Type: | dei:centralIndexKeyItemType
Balance Type: | na
Period Type: | duration

X
- Definition Document and entity information. + References No definition available. + Details
Name: | isba_DocumentAndEntityInformationAbstract
Namespace Prefix: | isba_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration