Note 8 - Significant Components of the Company's Net Deferred Taxes (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Accruals/reserves	$ 4,975	$ 6,709
Net operating loss carryforwards	219,243	211,749
Research and experimentation credits	14,089	14,089
Deferred rent expense	197	400
Difference in basis of plant and equipment	9,103	9,445
Valuation allowance	$ (247,607)	$ (242,392)
Net deferred tax assets

Amount, after allocation of valuation allowances and deferred tax liability, of deferred tax asset attributable to deductible differences and carryforwards, before jurisdictional netting.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from property, plant, and equipment.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible research tax credit carryforwards.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from deferred rent.

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Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

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