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Commitments and Contingencies (Tables) | 12 Months Ended
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Dec. 31, 2017
Commitments and Contingencies Disclosure [Abstract] |
Future minimum sublease rental payments [Table Text Block] | The following table shows the aggregate commitment by year:
|  | Commitment |
2018 |  | $ | 113,000 |
2019 |  |  | 233,000 |
2020 |  |  | 265,000 |
2021 |  |  | 227,000 |
|  | $ | 838,000 |
Other Commitments [Table Text Block] | The following table shows the aggregate commitment by year:
|  | Commitment |
2018 |  | $ | 592,000 |
2019 |  |  | 142,000 |
|  | $ | 734,000 |

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- Definition Tabular disclosure of information about obligations resulting from other commitments. + References No definition available. + Details
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