In XBRL, a unit specifies a unit of measure. Facts are associated with units, and the value of a fact is measured in the unit of measure associated with the fact.

Units

Within Gepsio, each XbrlFragment object contains a property called Units, which is a list of units specified in the fragment. Each unit in the list is represented by an object of class JeffFerguson.Gepsio.Unit. A unit has an ID and a collection of measure qualified names, each containing a namespace and a local name.

using JeffFerguson.Gepsio;
using System;

namespace Units
{
    class Program
    {
        static void Main(string[] args)
        {
            var xbrlDoc1 = new XbrlDocument();
            xbrlDoc1.Load(@"..\..\JeffFerguson.Gepsio.Test\XBRL-CONF-2014-12-10\Common\300-instance\301-01-IdScopeValid.xml");
            ShowUnitsInDocument(xbrlDoc1);
        }

        private static void ShowUnitsInDocument(XbrlDocument doc)
        {
            foreach(var currentFragment in doc.XbrlFragments)
            {
                ShowUnitsInFragment(currentFragment);
            }
        }

        private static void ShowUnitsInFragment(XbrlFragment currentFragment)
        {
            foreach(var currentUnit in currentFragment.Units)
            {
                ShowUnit(currentUnit);
            }
        }

        private static void ShowUnit(Unit currentUnit)
        {
            Console.WriteLine("UNIT");
            Console.WriteLine($"\tID  : {currentUnit.Id}");
            foreach(var currentMeasureQualifiedName in currentUnit.MeasureQualifiedNames)
            {
                Console.WriteLine($"\tName: {currentMeasureQualifiedName.Namespace}:{currentMeasureQualifiedName.LocalName}");
            }
        }
    }
}

Finding Units For A Fact

Each fact has two properties that specifies the unit that is associated with the fact: UnitRefName, which specifies the name of the unit associated with the fact, and UnitRef, which directly references the Unit object associated with the fact. The value of the fact is measured in the unit of measure specified by the Unit object associated with the fact.

using JeffFerguson.Gepsio;
using System;

namespace Units
{
    class Program
    {
        static void Main(string[] args)
        {
            var xbrlDoc1 = new XbrlDocument();
            xbrlDoc1.Load(@"..\..\JeffFerguson.Gepsio.Test\XBRL-CONF-2014-12-10\Common\300-instance\301-01-IdScopeValid.xml");
            ShowUnitsInDocument(xbrlDoc1);
            ShowFactsInDocument(xbrlDoc1);
        }

        private static void ShowUnitsInDocument(XbrlDocument doc)
        {
            foreach(var currentFragment in doc.XbrlFragments)
            {
                ShowUnitsInFragment(currentFragment);
            }
        }

        private static void ShowUnitsInFragment(XbrlFragment currentFragment)
        {
            foreach(var currentUnit in currentFragment.Units)
            {
                ShowUnit(currentUnit);
            }
        }

        private static void ShowUnit(Unit currentUnit)
        {
            Console.WriteLine("UNIT");
            Console.WriteLine($"\tID  : {currentUnit.Id}");
            foreach(var currentMeasureQualifiedName in currentUnit.MeasureQualifiedNames)
            {
                Console.WriteLine($"\tName: {currentMeasureQualifiedName.Namespace}:{currentMeasureQualifiedName.LocalName}");
            }
        }

        private static void ShowFactsInDocument(XbrlDocument doc)
        {
            foreach (var currentFragment in doc.XbrlFragments)
            {
                ShowFactsInFragment(currentFragment);
            }
        }

        private static void ShowFactsInFragment(XbrlFragment currentFragment)
        {
            foreach (var currentFact in currentFragment.Facts)
            {
                ShowFact(currentFact);
            }
        }

        private static void ShowFact(Fact fact)
        {
            Console.WriteLine($"FACT {fact.Name}");
            if (fact is Item)
            {
                ShowItem(fact as Item);
            }
        }

        private static void ShowItem(Item item)
        {
            Console.WriteLine("\tType     : Item");
            Console.WriteLine($"\tNamespace: {item.Namespace}");
            Console.WriteLine($"\tValue    : {item.Value}");
            Console.WriteLine($"\tUnit ID  : {item.UnitRefName}");
            if (item.UnitRef != null)
                ShowUnit(item.UnitRef);
        }
    }
}