Note 8 - Segment Reporting - Schedule of Active Partner Companies by Segment (Details)	Mar. 31, 2021
Aktana, Inc. [Member]
Ownership Interest	15.00%
Clutch Holdings [Member]
Ownership Interest	42.30%
Flashtalking, Inc. [Member]
Ownership Interest	13.20%
InfoBionic, Inc. [Member]
Ownership Interest	25.20%
Lumesis, Inc. [Member]
Ownership Interest	43.40%
MediaMath, Inc. [Member]
Ownership Interest	13.30%
meQuilibrium [Member]
Ownership Interest	32.00%
Moxe Health Corporation [Member]
Ownership Interest	27.60%
Prognos Health, Inc. [Member]
Ownership Interest	28.50%
Syapse, Inc. [Member]
Ownership Interest	11.10%
Trice Medical, Inc. [Member]
Ownership Interest	16.60%