Note 14 - Income Taxes - Significant Components of Deferred Tax Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Loss carry forwards	$ 36,093	$ 33,733
Derivative valuations		259
NQSO	2,060	1,964
Tax credits and other	116	438
Total deferred tax asset	38,269	36,394
Valuation allowance	(38,269)	(36,394)
Total deferred tax asset, net

Amount before allocation of valuation allowances of deferred tax asset attributable to debt discounts.

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Amount, before allocation of a valuation allowances, of deferred tax assets attributable to tax credits and other.

+ References

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards.

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Amount, after allocation of valuation allowances and deferred tax liability, of deferred tax asset attributable to deductible differences and carryforwards, without 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 share-based compensation.

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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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