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Quarterly Financial Information (unaudited) | 12 Months Ended
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Dec. 31, 2018
Quarterly Financial Data [Abstract] |
Quarterly Financial Information [Text Block] | Note 9 - Quarterly Financial Information (unaudited)
(in thousands, except per share data) |  | First Quarter |  |  | Second Quarter |  |  | Third Quarter |  |  | Fourth Quarter |
2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total Revenue |  | $ | 50 |  |  | $ | - |  |  | $ | - |  |  | $ | (50 | )
Operating expenses |  | $ | 6,477 |  |  | $ | 5,240 |  |  | $ | 7,656 |  |  | $ | 11,850 |
Other income |  | $ | 146 |  |  | $ | 147 |  |  | $ | 138 |  |  | $ | 130 |
Net loss |  | $ | (6,281 | ) |  | $ | (5,093 | ) |  | $ | (7,518 | ) |  | $ | (11,770 | )
Basic and diluted net loss per common share |  | $ | (0.24 | ) |  | $ | (0.19 | ) |  | $ | (0.28 | ) |  | $ | (0.43 | )
2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total Revenue |  | $ | - |  |  | $ | - |  |  | $ | - |  |  | $ | - |
Operating expenses |  | $ | 3,306 |  |  | $ | 5,665 |  |  | $ | 7,084 |  |  | $ | 15,730 |
Other income |  | $ | 88 |  |  | $ | 136 |  |  | $ | 144 |  |  | $ | 129 |
Net loss |  | $ | (3,218 | ) |  | $ | (5,529 | ) |  | $ | (6,940 | ) |  | $ | (15,601 | )
Basic and diluted net loss per common share |  | $ | (0.14 | ) |  | $ | (0.21 | ) |  | $ | (0.27 | ) |  | $ | (0.61 | )

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- References No definition available. + Details
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- Definition The entire disclosure for quarterly financial data. Includes, but is not limited to, tabular presentation of financial information for fiscal quarters, effect of year-end adjustments, and an explanation of matters or transactions that affect comparability of the information. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -URI http://asc.fasb.org/topic&trid=2126967 + Details
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