Note 2 - Ownership Interests and Advances - Schedule of Ownership Interests (Details)	Dec. 31, 2021	Dec. 31, 2020
Aktana, Inc. [Member]
Ownership Interest	13.40%	15.10%
Clutch Holdings [Member]
Ownership Interest	41.70%	42.30%
InfoBionic, Inc. [Member]
Ownership Interest	25.20%	25.20%
Lumesis, Inc. [Member]
Ownership Interest	43.20%	43.40%
MediaMath, Inc. [Member]
Ownership Interest	13.20%	13.30%
meQuilibrium [Member]
Ownership Interest	31.90%	32.00%
Moxe Health Corporation [Member]
Ownership Interest	27.60%	27.60%
Prognos Health, Inc. [Member]
Ownership Interest	28.50%	28.50%
Syapse, Inc. [Member]
Ownership Interest	11.10%	18.90%
Trice Medical, Inc. [Member]
Ownership Interest	12.60%	16.60%