Note 3 - Trade Accounts Receivable (Tables)

12 Months Ended

Dec. 31, 2019

Notes Tables

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

	20 1 9			20 1 8
	( i n thousands)
Billed	$	57,495		$	56,766
Unbilled		7,241			8,808
Allowance for doubtful accounts		(2,952	)		(2,224	)
Total accounts receivable—net	$	61,784		$	63,350

Financing Receivable, Current, Allowance for Credit Loss [Table Text Block]

	20 1 9		20 1 8		20 1 7
	( i n thousands)
Balance—beginning of year	$	2,224	$	1,335	$	994
Provision for bad debts		728		889		341
Charge-offs		-		-		-
Recoveries		-		-		-
Balance—end of year	$	2,952	$	2,224	$	1,335