Note 7 - Commitments and Contingencies (Details Textual) - USD ($)		1 Months Ended		51 Months Ended
	Dec. 31, 2021	Sep. 30, 2022	Jun. 30, 2015	Mar. 31, 2022
Self-insured Amount per Individual Claim			$ 50,000
Self-insured, Maximum Coverage Policy			$ 1,800,000
Self Insurance Reserve	$ 0	$ 0
Other Income	92,000
Workers' Compensation, Maximum Coverage Policy		1,800,000
Workers' Compensation, Accumulated Payments on Claims		1,800,000
Workers' Compensation, Estimated Accruals				$ 1,600,000
Worker's Compensation, Prepaid Amount	$ 126,000
Payments for Legal Settlements		$ 9,300,000