Note 7 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2016

Notes Tables

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

	December 31,
	201 6			201 5
Deferred tax assets:
Net operating losses	$	74,195		$	71,215
Fixed asset basis difference		10,662			6,457
Contributions carryover		5			5
Deferred compensation		2,375			2,513
Accrued liabilities		389			315
Total deferred tax assets		87,626			80,505
Valuation allowance for deferred tax assets		(87,626	)		(80,505	)
Net deferred tax asset	$	-		$	-

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

	Year Ended December 31,
	201 6			201 5			201 4
Expected federal income tax benefit at 34%	$	(8,955	)	$	(8,163	)	$	(6,418	)
Loss with no tax benefit provided		6,918			7,389			5,766
State income tax		4			4			4
Non-deductible expenses and other		2,037			774			652
Income tax expense	$	4		$	4		$	4