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Selected Quarterly Financial Data | 12 Months Ended
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Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract] |
Quarterly Financial Information [Text Block] | 11. Selected Quarterly Financial Data (Unaudited) (In thousands, except per share amounts)
|  | Quarter Ended |
|  | March 31, 2018 |  |  | June 30, 2018 |  |  | September 30, 2018 |  |  | December 31, 2018 |
Loss from operations |  | $ | (4,990 | ) |  | $ | (5,003 | ) |  | $ | (4,320 | ) |  | $ | (3,258 | )
Net (loss) |  | $ | (2,326 | ) |  | $ | (4,214 | ) |  | $ | (3,689 | ) |  | $ | (3,193 | )
Net loss per share – basic |  | $ | (0.70 | ) |  | $ | (1.05 | ) |  | $ | (0.93 | ) |  | $ | (1.12 | )
Net loss per share – dilutive |  | $ | (0.70 | ) |  | $ | (1.05 | ) |  | $ | (0.93 | ) |  | $ | (1.12 | )
Weighted average common share – basic |  |  | 3,673,340 |  |  |  | 3,683,384 |  |  |  | 4,028,304 |  |  |  | 13,442,104 |
Weighted average common share – dilutive |  |  | 3,673,340 |  |  |  | 3,683,384 |  |  |  | 4,028,304 |  |  |  | 13,442,104 |
|  | Quarter Ended |
|  | March 31, 2017 |  |  | June 30, 2017 |  |  | September 30, 2017 |  |  | December 31, 2017* |
Loss from operations |  | $ | (8,149 | ) |  | $ | (6,475 | ) |  | $ | (5,842 | ) |  | $ | (5,783 | )
Net (loss) income |  | $ | (3,058 | ) |  | $ | (4,315 | ) |  | $ | (10,930 | ) |  | $ | 2,812 |
Net (loss) income per share – basic |  | $ | (0.70 | ) |  | $ | (1.05 | ) |  | $ | (4.90 | ) |  | $ | 0.76 |
Net (loss) income per share – dilutive |  | $ | (0.70 | ) |  | $ | (1.05 | ) |  | $ | (4.90 | ) |  | $ | 0.76 |
Weighted average common share – basic |  |  | 3,355,636 |  |  |  | 3,514,435 |  |  |  | 3,665,134 |  |  |  | 3,673,340 |
Weighted average common share – dilutive |  |  | 3,355,636 |  |  |  | 3,514,435 |  |  |  | 3,665,134 |  |  |  | 3,673,340 |
*Net Income due to gain on remeasurement of the warrant liabilities in excess of the quarter to date loss.

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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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