Note 10 - Equity - Summary of Option Awards (Detail) - $ / shares	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Shares Underlying Options	10,000
MedAmerica [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Shares Underlying Options	10,000
Number of Shares Underlying Options, Expired	0
Number of Shares Underlying Options	10,000	10,000
Weighted Average Exercise Price Per Share	$ 6
Weighted Average Exercise Price Per Share, Options expired	0
Weighted Average Exercise Price Per Share	$ 6	$ 6
Weighted Average Remaining Contractual Life	2 months 12 days	5 months 12 days