7. Taxable Income (Loss): Differences Between Investment in Local Partnerships for Financial Reporting and Tax Purposes (Details) - USD ($)	Dec. 31, 2017	Dec. 31, 2016
Details
Investment in local partnerships - tax	$ (5,508,058)	$ (5,283,192)
Differences between the investment in local partnerships for tax and financial reporting purposes	$ 5,508,058	$ 5,283,192

Represents the monetary amount of Differences between the investment in local partnerships for tax and financial reporting purposes, as of the indicated date.

No definition available.

Name:	fil_DifferencesBetweenTheInvestmentInLocalPartnershipsForTaxAndFinancialReportingPurposes
Namespace Prefix:	fil_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant