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Sale of Subsidiaries (Details) - Seismic Asia Pacific Pty Ltd - Disposal Group, Disposed of by Sale, Not Discontinued Operations $ in Thousands | 1 Months Ended
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Feb. 28, 2019 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |
Proceeds from sale of subsidiary | $ 660
Proceeds in cash from sale of subsidiary | $ 240
Note receivable term (in years) | 2 years
Proceeds in note receivable from sale of subsidiary | $ 420
Working capital adjustment | $ 114

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