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Investments (Details) - USD ($) | 6 Months Ended |
--- | --- | ---
Jun. 30, 2021 | Dec. 31, 2020
Schedule of Equity Method Investments [Line Items] |  |
Cost method investment | $ 3,440,000 | $ 3,440,000
Equity Method Investee |  |
Schedule of Equity Method Investments [Line Items] |  |
Payments to acquire equity method investments | 200,000 |
Impairment of equity method investments | 0 |
Digital Construction Works, Inc. | Equity Method Investee |  |
Schedule of Equity Method Investments [Line Items] |  |
Equity method investments | $ 174,000 | $ 2,251,000
Ownership percentage | 50.00% |
Digital Construction Works, Inc. | Topcon |  |
Schedule of Equity Method Investments [Line Items] |  |
Ownership percentage | 50.00% |
Seequent |  |
Schedule of Equity Method Investments [Line Items] |  |
Equity method investments | $ 2,234,000 |

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