Note 10 - Equity - Summary of Option Awards (Detail) - $ / shares	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Shares Underlying Options	10,000
Number of Shares Underlying Options	0	10,000
MedAmerica [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Shares Underlying Options	10,000	70,000
Number of Shares Underlying Options, Expired	(10,000)	(60,000)
Number of Shares Underlying Options	0	10,000	70,000
Weighted Average Exercise Price Per Share	$ 6	$ 7.71
Weighted Average Exercise Price Per Share, Options expired	(6)	(8)
Weighted Average Exercise Price Per Share	$ 0	$ 6	$ 7.71
Weighted Average Remaining Contractual Life	0 years	5 months 12 days	1 year 9 months 3 days