Note 4 - Accounts Receivable (Tables)

9 Months Ended

Sep. 30, 2017

Notes Tables

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

	2017			2016
Retail customers	$	18,442		$	17,511
Wholesale carriers		4,309			4,293
Other		4,390			4,373
		27,141			26,177
Less: allowance for doubtful accounts		(2,165	)		(1,115	)
Accounts receivable, net	$	24,976		$	25,062

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

	2017
Balance at January 1	$	1,115
Provision for uncollectible accounts		2,562
Charged to other accounts		-
Deductions		(1,512	)
Balance at September 30	$	2,165