Note 7 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2014

Income Tax Disclosure [Abstract]

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

	December 31,
	2014			2013
Deferred tax assets:
Net operating losses	$	62,719		$	56,294
Fixed asset basis difference		6,518			6,559
Contributions carryover		2			2
Deferred compensation		2,659			2,354
Accrued liabilities		41			63
Total deferred tax assets		71,939			65,272
Valuation allowance for deferred tax assets		(71,939	)		(65,272	)
Net deferred tax asset	$	-		$	-

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

	Year Ended December 31,
	2014			2013			2012
Expected federal income tax benefit at 34%	$	(6,418	)	$	(7,698	)	$	(6,614	)
Loss with no tax benefit provided		5,766			7,108			5,535
State income tax		4			6			10
State tax benefit		0			0			(321	)
Non-deductible expenses and other		652			590			1,079
Income tax expense (benefit)	$	4		$	6		$	(311	)