Note 1 - Basis of Presentation (Details Textual)	3 Months Ended
Mar. 31, 2020
BAMKO [Member]
Subsidiary of Limited Liability Company or Limited Partnership, Ownership Interest	99.00%

The number of units or percentage investment held in the subsidiary by the limited liability company or limited partnership.

No definition available.

Name:	us-gaap_SubsidiaryOfLimitedLiabilityCompanyOrLimitedPartnershipOwnershipInterest
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration