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Debt - Convertible Senior Notes (Details)
1 Months Ended 3 Months Ended
Aug. 23, 2017
USD ($)
Jan. 09, 2017
USD ($)
trading_day
$ / shares
shares
Feb. 29, 2020
USD ($)
$ / shares
shares
Mar. 31, 2020
USD ($)
$ / shares
shares
Mar. 31, 2019
USD ($)
Dec. 31, 2019
$ / shares
Aug. 06, 2018
$ / shares
Jun. 10, 2015
USD ($)
Debt Instrument [Line Items]                
Conversion (shares) | shares     50,000          
Common stock, par value (in dollars per share) | $ / shares       $ 0.001   $ 0.001 $ 0.001  
Conversion price ($ per share) | $ / shares     $ 5.00          
Fair value of inducement shares issued in Notes Exchange       $ 7,933,000 $ 0      
Convertible Debt                
Debt Instrument [Line Items]                
Effective interest rate       10.76%        
Convertible Debt | Novatel Wireless Notes                
Debt Instrument [Line Items]                
Principal               $ 120,000,000.0
Debt conversion amount   $ 119,800,000 $ 250,000          
Stated interest rate of debt issued               5.50%
Converted amount   $ 119,800,000            
Convertible Debt | Inseego Notes                
Debt Instrument [Line Items]                
Extinguishment of debt, amount $ 14,900,000              
Stated interest rate of debt issued   5.50%            
Conversion (shares) | shares   212.7660   13,688,876        
Common stock, par value (in dollars per share) | $ / shares       $ 0.001        
Converted amount       $ 59,900,000        
Conversion price ($ per share) | $ / shares   $ 4.70            
Redemption price as a percentage of principal amount   100.00%            
Minimum principal needed to call debt   25.00%            
Redemption of principal   100.00%            
Company elected remedy in default   60 days            
Interest rate during remedy for default   0.50%            
Increase in fair value of equity component   $ 3,600,000            
Proceeds from issuance of debt, portion funded in repurchase and cancellation of debt $ 11,900,000              
Convertible Debt | Inseego Notes | Stock price exceeds 130% of conversion price                
Debt Instrument [Line Items]                
Threshold of trading days | trading_day   20            
Threshold of consecutive trading days   30            
Threshold percentage of stock price trigger   130.00%            
Convertible Debt | Inseego Notes | Debt trading price below product of stock price and conversion rate                
Debt Instrument [Line Items]                
Threshold of consecutive trading days   5            
Threshold percentage of stock price trigger   98.00%            
Number of consecutive business days   5            
Convertible Debt | Inseego Notes | Stock price exceeds 140% of conversion price                
Debt Instrument [Line Items]                
Threshold of trading days | trading_day   20            
Threshold of consecutive trading days   30            
Threshold percentage of stock price trigger   140.00%            
Redemption price as a percentage of principal amount   100.00%            
Convertible Debt | Inseego Notes, additional conversions                
Debt Instrument [Line Items]                
Conversion (shares) | shares       942,706        
Converted amount       $ 7,900,000        
Fair value of inducement shares issued in Notes Exchange       $ 7,900,000