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Debt - Convertible Senior Notes (Details) - Convertible Debt - USD ($) $ / shares in Units, $ in Millions | Aug. 23, 2017 | Jan. 09, 2017 | Jun. 30, 2018 | Jun. 10, 2015
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Debt Instrument [Line Items] |  |  |  |
Effective interest rate |  |  | 15.82% |
Novatel Wireless Notes |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Principal |  | $ 0.2 |  | $ 120.0
Stated interest rate of debt issued |  |  |  | 5.50%
Converted amount |  | 119.8 |  |
Conversion price ($ per share) |  |  |  | $ 5.00
Debt issuance costs |  |  |  | $ 3.9
Inseego Notes |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Principal |  | $ 119.8 |  |
Extinguishment of debt, amount | $ 14.9 |  |  |
Stated interest rate of debt issued |  | 5.50% |  |
Conversion (shares) |  | 212.7660 |  |
Conversion price ($ per share) |  | $ 4.70 |  |
Redemption price as a percentage of principal amount |  | 100.00% |  |
Redemption of principal |  | 100.00% |  |
Increase in fair value of equity component |  | $ 3.6 |  |
Proceeds from issuance of debt, portion funded in repurchase and cancellation of debt | $ 11.9 |  |  |
Inseego Notes | Debt Instrument, Redemption, Period Three [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Redemption price as a percentage of principal amount |  | 100.00% |  |

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- Definition The value of the financial instrument(s) that the original debt is being converted into in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4304-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4332-108586 + Details
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- Definition The number of shares issued in exchange for the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or payments in the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4332-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4304-108586 + Details
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