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Accrued Expenses and Other Current Liabilities (Details) - USD ($) | Jan. 31, 2017 | Jul. 31, 2016 | Jan. 31, 2016 | Jul. 31, 2015
--- | --- | --- | --- | ---
Business Acquisition [Line Items] |  |  |  |
Accrued wages and benefits | $ 23,395,000 | $ 23,394,000 |  |
Accrued legal costs | 19,909,000 | 32,469,000 |  |
Accrued warranty obligations | 19,014,000 | 15,362,000 | $ 8,624,000 | $ 8,638,000
Accrued acquisition-related costs | 0 | 2,119,000 |  |
Accrued contract costs | 10,687,000 | 8,348,000 |  |
Accrued commissions and royalties | 3,233,000 | 3,473,000 |  |
Other | 12,557,000 | 12,869,000 |  |
Accrued expenses and other current liabilities | 88,795,000 | 98,034,000 |  |
TeleCommunication Systems Inc. | Pre-Acquisition Contingencies Related to TCS Intellectual Property |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Accrued legal costs | 14,758,000 | $ 28,112,000 |  |
TeleCommunication Systems Inc. | TCS's 911 call handling software [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Accrued warranty obligations | $ 10,595,000 |  |  |

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