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Note 11 - Quarterly Financial Information (Unaudited) (Tables) | 12 Months Ended
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Dec. 31, 2016
Notes Tables |
Quarterly Financial Information [Table Text Block] |
|  | First |  | Second |  | Third |  | Fourth
2016 Quarters |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  | $ | 4,820 |  |  | $ | 4,787 |  |  | $ | 7,763 |  |  | $ | 8,983 |
Net Loss |  |  | (22,832 | ) |  |  | (16,281 | ) |  |  | (11,528 | ) |  |  | (4,503 | )
Basic and diluted net loss per share |  |  | (0.31 | ) |  |  | (0.22 | ) |  |  | (0.16 | ) |  |  | (0.06 | )
2015 Quarters |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  | $ | 6,826 |  |  | $ | 25,842 |  |  | $ | 10,987 |  |  | $ | 4,602 |
Net (Loss) Income |  |  | (15,164 | ) |  |  | 4,901 |  |  |  | (14,621 | ) |  |  | (18,135 | )
Basic net (loss) income per share |  |  | (0.21 | ) |  |  | 0.07 |  |  |  | (0.20 | ) |  |  | (0.25 | )
Diluted net (loss) income per share |  |  | (0.21 | ) |  |  | 0.06 |  |  |  | (0.20 | ) |  |  | (0.25 | )

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- Definition Tabular disclosure of quarterly financial data. Includes, but is not limited to, financial information for fiscal quarters, cumulative effect of a change in accounting principle and earnings per share data. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a)-(j) -URI http://asc.fasb.org/extlink&oid=68076893&loc=d3e1280-108306 + Details
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