Arelle command line does not resolve contexts on factTables

[Vijay Rumao]

Thank you for the wonderful product Arelle. 

When I hit this url

http://localhost:8080/rest/xbrl/view?file=http://www.sec.gov/Archives/edgar/data/1406587/000140658719000036/0001406587-19-000036-xbrl.zip&view=factTable&media=xml

I get results. In the results if I go under consolidated balance sheet I see.

<linkRole role="http://www.forestargroup.com/role/ConsolidatedBalanceSheets">
  <facts concept="us-gaap:StatementOfFinancialPositionAbstract">
   <facts concept="us-gaap:AssetsAbstract">
    <facts concept="us-gaap:CashAndCashEquivalentsAtCarryingValue">
     <fI2018Q4>318,800,000</fI2018Q4>
     <fI2019Q4>382,800,000</fI2019Q4>
    </facts> . . .

if we see fI2019Q4 shouldn't this be resolved to appropriate date. If we look at file for-20190930.xml within the xbrl zip file. We see that fI2019Q4 is defined as follows.

<xbrli:context id="FI2019Q4">
  <xbrli:entity>
   <xbrli:identifier scheme="http://www.sec.gov/CIK">0001406587</xbrli:identifier>
  </xbrli:entity>
  <xbrli:period>
   <xbrli:instant>2019-09-30</xbrli:instant>
  </xbrli:period>

 </xbrli:context>

Shouldn't this date be used on factTable view consolidatedbalancesheet.

<linkRole role="http://www.forestargroup.com/role/ConsolidatedBalanceSheets">
  <facts concept="us-gaap:StatementOfFinancialPositionAbstract">
   <facts concept="us-gaap:AssetsAbstract">
    <facts concept="us-gaap:CashAndCashEquivalentsAtCarryingValue">
     <fI2018Q4>318,800,000</fI2018Q4>
     <2019-09-30>382,800,000</2019-09-30>
    </facts> . . .

I might be wrong but in my humble opinion this makes coding simpler on the consumer end.

[Vijay Rumao]

If above request is not possible. Is there a way for me to access contexts from arelle webservices? I did not find any view that shows me the contexts. In that case I have to unzip the zip file and parse the instance document. Now since arelle automatically unzips the xbrl zip file it would be beneficial to know if there is a view which displays all the contexts since it will save me time and effort as I don't have to reinvent the wheel of unzipping the xbrl zip file.

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