Note 11 - Equity - Summary of Option Awards (Detail) - MedAmerica [Member] - $ / shares	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Shares Underlying Options	10,000
Number of Shares Underlying Options, Expired	(10,000)
Number of Shares Underlying Options	0	10,000
Weighted Average Exercise Price Per Share	$ 6
Weighted Average Exercise Price Per Share, Options expired	(6)
Weighted Average Exercise Price Per Share	$ 0	$ 6
Weighted Average Remaining Contractual Life		5 months 12 days