Note 5 - Details of Selected Balance Sheet Accounts (Tables)

6 Months Ended

Jun. 30, 2018

Notes Tables

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

	June 30, 2018			December 31, 201 7
Accounts receivable, net:
Trade	$	54,190		$	46,692
Unbilled revenue		22,741			20,555
Other		158			914
Total accounts receivable		77,089			68,161
Allowance for doubtful accounts		(1,300	)		(1,338	)
Total accounts receivable, net	$	75,789		$	66,823

Schedule of Inventory, Current [Table Text Block]

	June 30, 2018		December 31, 201 7
Inventories:
Finished goods and purchased products	$	2,581	$	2,211
Work in process		1,040		4,096
Raw materials		1,099		939
Total inventories	$	4,720	$	7,246

Property, Plant and Equipment [Table Text Block]

	Estimated Useful Life (in years)				June 30, 2018			December 31, 201 7
Property, plant and equipment, net:
Land					$	47,929		$	40,567
Accommodations assets		3	-	15		1,719,298			1,658,867
Buildings and leasehold improvements		5	-	20		24,229			24,181
Machinery and equipment		4	-	15		10,243			8,848
Office furniture and equipment		3	-	7		53,889			53,688
Vehicles		3	-	5		14,390			13,869
Construction in progress						4,480			2,770
Total property, plant and equipment						1,874,458			1,802,790
Accumulated depreciation						(1,140,216	)		(1,108,957	)
Total property, plant and equipment, net					$	734,242		$	693,833

Schedule of Accrued Liabilities [Table Text Block]

	June 30, 2018		December 31, 201 7
Accrued liabilities:
Accrued compensation	$	15,459	$	20,424
Accrued taxes, other than income taxes		1,538		1,224
Accrued interest		38		15
Other		230		545
Total accrued liabilities	$	17,265	$	22,208