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Note 8 - Income Taxes (Detail) - Components of the Company’s Deferred Tax Asset (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Net operating loss carry forwards	$ 49,408	$ 40,104
Compensation expense related to employee stock options	2,817	2,285
Subtotal	52,225	42,389
Valuation allowance	$ (52,225)	$ (42,389)

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

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

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