Note 14 - Valuation and Qualifying Accounts

12 Months Ended

Dec. 31, 2014

Valuation and Qualifying Accounts [Abstract]

Schedule of Valuation and Qualifying Accounts Disclosure [Text Block]

	Balance at Beginning of Year		Additions		Deductions		Balance at End of Year
Deferred tax assets valuation allowance
Year ended December 31, 2014	$	22,762	$	3,780	$	496	$	26,046
Year ended December 31, 2013	$	21,907	$	3,437	$	2,582	$	22,762
Year ended December 31, 2012(1)	$	20,551	$	1,773	$	417	$	21,907

	Balance at Beginning of Year		Additions		Deductions		Balance at End of Year
Allowance for doubtful accounts receivable
Year ended December 31, 2014	$	19	$	4	$	23	$	—
Year ended December 31, 2013	$	—	$	19	$	—	$	19
Year ended December 31, 2012	$	8	$	66	$	74	$	—

(1)The Company revised the deferred tax assets valuation allowance balance for calendar year 2012 as a result of revisions to its deferred tax assets relating to stock-based compensation and the resulting valuation allowance for them. These changes had no impact to the Company’s balance sheets, statement of operations, earnings per share, statement of cash flows, or statement of equity for any period presented. The beginning balance for 2012 was reduced by $723,000, and the deductions for the year were increased by $276,000, which resulted in a net change in the ending balance for the year by $999,000.