Note 12 - Option Liabilities (Details Textual) - USD ($)
$ / shares in Units, $ in Thousands |
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12 Months Ended |
Oct. 26, 2016 |
Aug. 11, 2016 |
May 19, 2016 |
Mar. 10, 2016 |
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
| Original Valuation, Options |
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$ 511
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| Fair Value Assumptions, Risk Free Interest Rate |
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1.10%
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| Fair Value Assumptions, Expected Dividend Rate |
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0.00%
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0.00%
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| Fair Value Adjustment of Options |
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$ 2,613
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| Gain (Loss) on Contract Modification |
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(2,126)
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| The 200 Million Share, Call Option [Member] |
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| Original Valuation, Options |
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489
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| Derivative Liability, Current |
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0
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0
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| Fair Value Adjustment of Options |
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2,442
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| The 100 Million Share, Call Option [Member] |
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| Original Valuation, Options |
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22
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| Derivative Liability, Current |
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0
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$ 0
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| Fair Value Adjustment of Options |
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$ 171
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| The 2016 Purchase Agreement [Member] |
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| Common Stock Purchase Agreement, Purchase Price per Share, After Satisfaction of Certain Conditions |
$ 0.15
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$ 0.15
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| Common Stock Purchase Agreement, the Other Purchase Price per Share, No Later than 90 Days after Satisfaction of Certain Conditions |
$ 0.25
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$ 0.25
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| Common Stock Purchase Agreement, Remaining Number of Shares Required to be Purchased before Forfeiture of RIghts |
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300,000,000
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| Gain (Loss) on Contract Modification |
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$ (2,126)
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| Stock Issued During Period, Shares, New Issues |
300,000,000
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105,000,000
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| The 2016 Purchase Agreement [Member] | The 200 Million Share, Call Option [Member] |
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| Original Valuation, Options |
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$ 489
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| Derivative Liability, Current |
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$ 2,931
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| Fair Value Adjustment of Options |
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2,442
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| The 2016 Purchase Agreement [Member] | The 100 Million Share, Call Option [Member] |
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| Original Valuation, Options |
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22
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| Derivative Liability, Current |
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$ 193
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| Fair Value Adjustment of Options |
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$ 171
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| The 2016 Purchase Agreement [Member] | Call Option [Member] |
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| Fair Value Assumptions, Expected Term |
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91 days
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| Fair Value Assumptions, Expected Volatility Rate |
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85.00%
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| Fair Value Assumptions, Risk Free Interest Rate |
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0.31%
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| Fair Value Assumptions, Expected Dividend Rate |
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0.00%
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| The 2016 Purchase Agreement [Member] | Common Stock, Purchase Price per Share of $0.15 [Member] |
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| Common Stock Purchase Agreement, Remaining Number of Shares to be Purchased, After the Satisfaction of Certain Conditions |
200,000,000
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200,000,000
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| Stock Issued During Period, Shares, New Issues |
200,000,000
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| The 2016 Purchase Agreement [Member] | Common Stock, Purchase Price per Share of $0.25 [ Member] |
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| Common Stock Purchase Agreement, Remaining Number of Shares to be Purchased, After the Satisfaction of Certain Conditions |
100,000,000
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100,000,000
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| Stock Issued During Period, Shares, New Issues |
100,000,000
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