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Note 2 - Investments in and Advances To Local Limited Partnerships (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Details
Investment Balance	$ 0	$ 0

Represents the monetary amount of Investment Balance, as of the indicated date.

No definition available.

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

No definition available.

Name:	us-gaap_TextBlockAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration