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v3.19.1

Note payable (Details) - USD ($) | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Debt Instrument [Line Items] |  |
Total note payable | $ 0 | $ 686,000
Note payable to related party | 0 | 686,000
Note payable, excluding current portion | 0 | 0
Working Capital Loan 1 [Member] |  |
Debt Instrument [Line Items] |  |
Total note payable | $ 0 | $ 686,000

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