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Income Taxes (Details 2) | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017
Summary of reconciliation of Effective income tax rate and statutory federal income tax rate |  |
Amounts at statutory tax rates | 21.00% | 34.00%
Federal tax reform - deferred rate change |  | (170.00%)
Accounting method adoption |  | 11.00%
Foreign losses taxed at different rates | (1.00%) | (7.00%)
Foreign withholding tax |  | 1.00%
Stock-based compensation | 7.00% |
Other | (2.00%) | (1.00%)
Total | 11.00% | (132.00%)
Valuation allowance | (11.00%) | 133.00%
Effective tax rate |  | 1.00%

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