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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2018
Income Tax Disclosure [Abstract] |
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] | A reconciliation of the statutory U.S. federal rate to the Company’s effective tax rate is as follows:
|  | For the year ended December 31,
|  | 2018 |  |  | 2017 |
Statutory federal income tax rate |  |  | 21 | % |  |  | 35 | %
State taxes, net of federal tax benefit |  |  | 7 | % |  |  | 9 | %
Non-deductible items |  |  | - |  |  |  | (2 | )%
Credits |  |  | 3 | % |  |  | - |
Federal tax rate change |  |  | - |  |  |  | (18 | )%
State tax rate change |  |  | (2 | )% |  |  | (1 | )%
Other |  |  | (1 | )% |  |  | (1 | )%
Change in valuation allowance |  |  | (28 | )% |  |  | (22 | )%
Income taxes provision (benefit) |  |  | - |  |  |  | - |
Schedule of Deferred Tax Assets and Liabilities [Table Text Block] | The components of the net deferred tax asset as of December 31, 2018 and 2017 are the following ($ in thousands):
|  | For the year ended December 31, |
|  | 2018 |  |  | 2017 |
Deferred tax assets: |  |  |  |  |  |  |  |
Net operating loss carryovers |  | $ | 14,305 |  |  | $ | 7,236 |
Stock compensation and other |  |  | 1,427 |  |  |  | 697 |
Change in warrant liability |  |  | 45 |  |  |  | 50 |
Amortization of license |  |  | 6,258 |  |  |  | 6,424 |
Accruals and reserves |  |  | 237 |  |  |  | 22 |
Startup costs |  |  | 6 |  |  |  | 8 |
Tax credits |  |  | 1,070 |  |  |  | 178 |
Total deferred tax assets |  | $ | 23,348 |  |  | $ | 14,615 |
Less valuation allowance |  |  | (23,348 | ) |  |  | (14,615 | )
Deferred tax assets, net of allowance |  | $ | - |  |  | $ | - |

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- Definition Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319 + Details
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- Definition Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + Details
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