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Acquisitions - Summary of Allocation of Purchase Price (Detail) - USD ($) $ in Thousands | Dec. 31, 2019 | Jan. 09, 2019 | Dec. 31, 2018
--- | --- | --- | ---
Business Acquisition [Line Items] |  |  |
Goodwill | $ 7,797 |  | $ 3,685
Smart Retail [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Costs incurred on projects not complete |  | $ 53 |
Intangible assets |  | 5,229 |
Goodwill |  | 4,112 |
Total assets |  | 9,394 |
Deferred revenue |  | 291 |
Total liabilities |  | 291 |
Total purchase price |  | $ 9,103 |

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