Nature of Business and Significant Accounting Policies - Additional Information (Detail)			3 Months Ended									9 Months Ended	12 Months Ended
	Mar. 06, 2020 USD ($) shares	Aug. 09, 2019 USD ($) $ / shares shares	Mar. 31, 2020 USD ($)	Dec. 31, 2019 USD ($) $ / shares	Sep. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Dec. 31, 2018 USD ($) $ / shares	Sep. 30, 2018 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Sep. 30, 2019 Segments	Dec. 31, 2019 USD ($) $ / shares	Dec. 31, 2018 USD ($) $ / shares
Nature Of Business And Significant Accounting Policies [Line Items]
Net income (loss) attributable to common stockholders				$ (13,285,000)	$ (8,937,000)	$ (10,779,000)	$ (7,485,000)	$ (4,191,000)	$ 10,843,000	$ (6,660,000)	$ (8,050,000)		$ (40,486,000)	$ (8,058,000)
Cash and cash equivalents				12,100,000									12,100,000
Working capital				$ 19,600,000									19,600,000
Number of reportable segments | Segments												1
Impairment of indefinite-lived intangible assets													$ 0	700,000
Long-lived assets impairment														$ 700,000
Preferred stock, par value (in dollars per share) | $ / shares				$ 0.001				$ 0.001					$ 0.001	$ 0.001
Gross proceeds received from issuance of Series E preferred stock													$ 10,000,000	$ 0
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
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
Series E Preferred Stock
Nature Of Business And Significant Accounting Policies [Line Items]
Preferred stock, shares issued (in shares) | shares		10,000
Preferred stock, par value (in dollars per share) | $ / shares		$ 0.001
Gross proceeds received from issuance of Series E preferred stock		$ 10,000,000.0
Subsequent Event | Series E Preferred Stock
Nature Of Business And Significant Accounting Policies [Line Items]
Preferred stock, shares issued (in shares) | shares	25,000
Gross proceeds received from issuance of Series E preferred stock	$ 25,000,000.0
Convertible Debt | Inseego Notes | Subsequent Event
Nature Of Business And Significant Accounting Policies [Line Items]
Principal exchanged			$ 59,900,000
London Interbank Offered Rate (LIBOR) | Senior Credit Agreement | Subsequent Event
Nature Of Business And Significant Accounting Policies [Line Items]
Margin on base rate			7.65%