Extract Data From XBRL and iXBRL files in C#: The related step by step guide can be found here: https://kb.aspose.com/finance/net/how-to-extract-data-from-xbrl-file-in-c-sharp/

Extract Data From XBRL and iXBRL files in C#.cs

using System;
using System.Collections.Generic;
//Add reference to Aspose.Finance for .NET API
//Use below namespaces to extract data from XBRL file
using Aspose.Finance;
using Aspose.Finance.Xbrl;
using Aspose.Finance.Xbrl.Dom;
using Aspose.Finance.Xbrl.Inline;

namespace ExtractDataFromXBRLFile
{
    class Program
    {
        static void Main(string[] args)
        {
            //Set Aspose license before extracting data from XBRL file
            //using Aspose.Finance for .NET
            Aspose.Finance.License AsposeFinanceLicense = new Aspose.Finance.License();
            AsposeFinanceLicense.SetLicense(@"c:\asposelicense\license.lic");

            //load XBRL document
            InlineXbrlDocument XBRLDocument = new InlineXbrlDocument("InputXBRLDataFile.html");
            //retrieve XBRL document contents 
            NodeList childNodes = XBRLDocument.ChildNodes;
            Node firstChild = XBRLDocument.FirstChild;
            List<InlineFootnote> footNotes = XBRLDocument.Footnotes;
            List<InlineFact> inlineFacts = XBRLDocument.Facts;
            List<Context> contexts = XBRLDocument.Contexts;
            List<Unit> units = XBRLDocument.Units;

            //further use the XBRL document information 
            foreach (InlineFact fact in inlineFacts)
            {
                Console.WriteLine("Fact: {0}", fact.Name);
            }

        }
    }
}