Note 7 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2015

Notes Tables

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

	December 31,
	2015			2014
Deferred tax assets:
Net operating losses	$	71,215		$	62,719
Fixed asset basis difference		6,457			6,518
Contributions carryover		5			2
Deferred compensation		2,513			2,659
Accrued liabilities		315			41
Total deferred tax assets		80,505			71,939
Valuation allowance for deferred tax assets		(80,505	)		(71,939	)
Net deferred tax asset	$	-		$	-

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

	Year Ended December 31,
	2015			2014			2013
Expected federal income tax benefit at 34%	$	(8,163	)	$	(6,418	)	$	(7,698	)
Loss with no tax benefit provided		7,389			5,766			7,108
State income tax		4			4			6
Non-deductible expenses and other		774			652			590
Income tax expense	$	4		$	4		$	6