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Segment and Related Information - Reconciliation of Segment Assets (Details) - USD ($) $ in Thousands | Mar. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Identifiable assets by geographic area [Abstract] |  |
Identifiable assets | $ 14,052 | $ 14,352
Goodwill by business segment [Abstract] |  |
Goodwill | 41,386 | 41,386
Operating segments | Restaurant/Retail |  |
Identifiable assets by geographic area [Abstract] |  |
Identifiable assets | 1,974 | 1,987
Goodwill by business segment [Abstract] |  |
Goodwill | 40,650 | 40,650
Operating segments | Government |  |
Identifiable assets by geographic area [Abstract] |  |
Identifiable assets | 257 | 272
Goodwill by business segment [Abstract] |  |
Goodwill | 736 | 736
Reportable geographical components | United States |  |
Identifiable assets by geographic area [Abstract] |  |
Identifiable assets | 13,760 | 14,260
Reportable geographical components | Other Countries |  |
Identifiable assets by geographic area [Abstract] |  |
Identifiable assets | 292 | 92
Other |  |
Identifiable assets by geographic area [Abstract] |  |
Identifiable assets | $ 11,821 | $ 12,093

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