Note 7 - Long-term Debt (Tables)

12 Months Ended

Dec. 31, 2020

Notes Tables

Schedule of Debt [Table Text Block]

					Applicable
					Spread Rates for
		Applicable Spread Rates			Domestic Rate
	Average Excess Revolver Availability	for Eurodollar Rate			Revolving
Revolver Pricing Level	for Previous Quarter	Revolving Advances			Advances
I	$25,000,000+		1.00	%		0.50	%
II	$17,500,000 to < 25,000,000		1.25	%		0.50	%
III	$10,000,000 to < 17,500,000		1.50	%		2.50	%
IV	$< 10,000,000		1.75	%		0.00	%