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Nature of Business and Significant Accounting Policies - Additional Information (Detail) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2018 USD ($) | Sep. 30, 2018 USD ($) | Jun. 30, 2018 USD ($) | Mar. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Sep. 30, 2017 USD ($) | Jun. 30, 2017 USD ($) | Mar. 31, 2017 USD ($) | Dec. 31, 2018 USD ($) Segments | Dec. 31, 2017 USD ($)
Nature Of Business And Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Net income (loss) attributable to Inseego Corp. | $ (4,191,000) | $ 10,843,000 | $ (6,660,000) | $ (8,050,000) | $ (3,822,000) | $ (13,789,000) | $ (12,024,000) | $ (16,100,000) | $ (8,058,000) | $ (45,735,000)
Cash and cash equivalents | 31,000,000 |  |  |  |  |  |  |  | 31,000,000 |
Working capital | $ 30,700,000 |  |  |  |  |  |  |  | $ 30,700,000 |
Number of reportable segments | Segments |  |  |  |  |  |  |  |  | 1 |
Impairment of indefinite-lived intangible assets |  |  |  |  |  |  |  |  | $ 0 | 300,000
Long-lived assets impairment |  |  |  |  |  |  |  |  | $ 700,000 | $ 100,000
Internal Use Software |  |  |  |  |  |  |  |  |  |
Nature Of Business And Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Property, plant and equipment useful lives |  |  |  |  |  |  |  |  | 5 years |
Minimum |  |  |  |  |  |  |  |  |  |
Nature Of Business And Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Property, plant and equipment useful lives |  |  |  |  |  |  |  |  | 13 months |
General warranty period |  |  |  |  |  |  |  |  | 1 year |
Minimum | Rental Assets |  |  |  |  |  |  |  |  |  |
Nature Of Business And Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Property, plant and equipment useful lives |  |  |  |  |  |  |  |  | 3 years |
Maximum |  |  |  |  |  |  |  |  |  |
Nature Of Business And Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Property, plant and equipment useful lives |  |  |  |  |  |  |  |  | 6 years |
General warranty period |  |  |  |  |  |  |  |  | 3 years |
Maximum | Buildings |  |  |  |  |  |  |  |  |  |
Nature Of Business And Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Property, plant and equipment useful lives |  |  |  |  |  |  |  |  | 50 years |
Maximum | Rental Assets |  |  |  |  |  |  |  |  |  |
Nature Of Business And Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Property, plant and equipment useful lives |  |  |  |  |  |  |  |  | 4 years |

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