Note 5 - Accounts Receivable (Tables)

3 Months Ended

Mar. 31, 2020

Notes Tables

Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]

	2020			2019
Retail customers	$	20,085		$	22,101
Wholesale carriers		8,257			13,157
Other		3,681			3,723
		32,023			38,981
Less: allowance for doubtful accounts		(4,285	)		(4,627	)
Accounts receivable, net	$	27,738		$	34,354

Changes in the Allowance for Doubtful Accounts [Table Text Block]

	2020
Balance at January 1	$	4,627
Provision for uncollectible accounts		(229	)
Charged to other accounts		-
Deductions		(113	)
Asset at March 31	$	4,285