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Debt - Narrative (Details)
12 Months Ended
Mar. 20, 2017
USD ($)
Jan. 09, 2017
USD ($)
Jun. 10, 2015
USD ($)
trading_day
$ / shares
Oct. 31, 2014
USD ($)
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Nov. 17, 2015
USD ($)
Debt Instrument [Line Items]              
Conversion rate     0.2        
Conversion price ($ per share) | $ / shares     $ 5.00        
Long-term debt         $ 120,585,000    
Stock price exceeds 130% of conversion price              
Debt Instrument [Line Items]              
Threshold of trading days | trading_day     20        
Threshold of consecutive trading days     30 days        
Threshold percentage of stock price trigger     130.00%        
Debt trading price below product of stock price and conversion rate              
Debt Instrument [Line Items]              
Threshold of consecutive trading days     5 days        
Threshold percentage of stock price trigger     98.00%        
Stock price exceeds 140% of conversion price              
Debt Instrument [Line Items]              
Threshold of trading days | trading_day     20        
Threshold of consecutive trading days     30 days        
Threshold percentage of stock price trigger     140.00%        
Convertible Debt              
Debt Instrument [Line Items]              
Term of debt instrument     5 years        
Convertible debt, face amount     $ 120,000,000   $ 120,000,000    
Debt issuance costs     $ 3,900,000        
Convertible debt, stated interest rate     5.50%        
Repurchase 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%        
Debt issuance cost allocated to equity component     $ 1,300,000        
Debt issuance costs allocated to liability component     $ 2,600,000        
Effective interest rate         16.55%    
Long-term debt         $ 90,908,000    
Convertible Debt | Debt trading price below product of stock price and conversion rate              
Debt Instrument [Line Items]              
Number of consecutive business days     5 days        
Convertible Debt | Stock price exceeds 140% of conversion price              
Debt Instrument [Line Items]              
Repurchase price as a percentage of principal amount     100.00%        
Revolving Credit Facility              
Debt Instrument [Line Items]              
Maximum borrowing capacity of revolving credit facility       $ 25,000,000     $ 48,000,000
Outstanding borrowings under the credit facility         0    
Term of debt instrument       5 years      
Available borrowings         $ 4,700,000    
Revolving Credit Facility | Minimum              
Debt Instrument [Line Items]              
Margin on base rate         3.00%    
Revolving Credit Facility | Maximum              
Debt Instrument [Line Items]              
Margin on base rate         3.50%    
Letter of Credit              
Debt Instrument [Line Items]              
Maximum borrowing capacity of revolving credit facility       $ 3,000,000      
Available borrowings         $ 700,000    
Absa              
Debt Instrument [Line Items]              
Maximum borrowing capacity of revolving credit facility         1,700,000    
Outstanding borrowings under the credit facility         $ 1,700,000 $ 1,500,000  
Absa | Mortgage Bond              
Debt Instrument [Line Items]              
Margin on base rate         1.75%    
Term of debt instrument         10 years    
Effective interest rate         8.75%    
Long-term debt         $ 600,000 700,000  
Grindrod Bank              
Debt Instrument [Line Items]              
Maximum borrowing capacity of revolving credit facility         1,500,000    
Outstanding borrowings under the credit facility         $ 1,500,000 $ 1,800,000  
Prime Rate | Absa              
Debt Instrument [Line Items]              
Margin on base rate         0.10%    
Interest rate at period end         10.40%    
Prime Rate | Grindrod Bank              
Debt Instrument [Line Items]              
Margin on base rate         1.00%    
Interest rate at period end         11.50%    
Subsequent Event | Revolving Credit Facility              
Debt Instrument [Line Items]              
Maximum borrowing capacity of revolving credit facility $ 10,000,000            
Subsequent Event | Prime Rate | Revolving Credit Facility              
Debt Instrument [Line Items]              
Margin on base rate 1.50%            
Subsequent Event | London Interbank Offered Rate (LIBOR) | Revolving Credit Facility              
Debt Instrument [Line Items]              
Margin on base rate 4.00%            
Inseego Notes | Subsequent Event | Convertible Debt              
Debt Instrument [Line Items]              
Convertible debt, face amount   $ 119,800,000          
Debt issuance costs   $ 1,100,000          
Convertible debt, stated interest rate   5.50%          
Repurchase price as a percentage of principal amount   100.00%          
Novatel Wireless Notes | Subsequent Event | Convertible Debt              
Debt Instrument [Line Items]              
Convertible debt, face amount   $ 200,000          
Principal exchanged   $ 119,750,000