Note 4 - Details of Selected Balance Sheet Accounts (Tables)

3 Months Ended

Mar. 31, 2016

Notes Tables

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

	March 31, 2016			December 31, 201 5
Accounts receivable, net:
Trade	$	40,758		$	44,650
Unbilled revenue		22,376			16,649
Other		1,163			1,289
Total accounts receivable		64,297			62,588
Allowance for doubtful accounts		(982	)		(1,121	)
Total accounts receivable, net	$	63,315		$	61,467

Schedule of Inventory, Current [Table Text Block]

	March 31, 2016		December 31, 201 5
Inventories:
Finished goods and purchased products	$	2,009	$	1,854
Work in process		593		1,260
Raw materials		2,561		2,517
Total inventories	$	5,163	$	5,631

Property, Plant and Equipment [Table Text Block]

	Estimated Useful Life (in years)			March 31, 2016			December 31, 201 5
Property, plant and equipment, net:
Land				$	49,967		$	47,825
Accommodations assets	3	-	15		1,578,680			1,482,842
Buildings and leasehold improvements	3	-	20		28,355			29,099
Machinery and equipment	4	-	15		9,786			9,183
Office furniture and equipment	3	-	7		30,745			29,172
Vehicles	3	-	5		15,542			15,412
Construction in progress					30,576			52,558
Total property, plant and equipment					1,743,651			1,666,091
Accumulated depreciation					(797,595	)		(734,177	)
Total property, plant and equipment, net				$	946,056		$	931,914

Schedule of Accrued Liabilities [Table Text Block]

	March 31, 2016		December 31, 201 5
Accrued liabilities:
Accrued compensation	$	8,674	$	11,726
Accrued taxes, other than income taxes		1,713		963
Accrued interest		201		12
Other		1,980		2,133
Total accrued liabilities	$	12,568	$	14,834