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Note 1 - The Company and Summary of Significant Accounting Policies (Details) - USD ($) | Jun. 30, 2016 | Dec. 31, 2015
--- | --- | ---
Level 1 |  |
Assets |  |
Asset | $ 0 | $ 0
Liabilities |  |
Warrant liability | 0 | 0
Accrued expense |  | 0
Level 2 |  |
Assets |  |
Asset | 0 | 0
Liabilities |  |
Warrant liability | 492,000 | 44,531,000
Accrued expense |  | 4,326,000
Level 3 |  |
Assets |  |
Asset | 0 | 0
Liabilities |  |
Warrant liability | $ 0 | 0
Accrued expense |  | $ 0

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