5. Investment in Local Partnerships: Equity in loss of investment in local partnerships (Details) - USD ($)	12 Months Ended
Dec. 31, 2017	Dec. 31, 2016
Details
Excess Losses Applied to Other Partners' Capital	$ 112,218	$ 180,177

Represents the monetary amount of Excess Losses Applied to Other Partners' Capital, during the indicated time period.

No definition available.

Name:	fil_ExcessLossesAppliedToOtherPartnersCapital
Namespace Prefix:	fil_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration