Subsequent Events (Details)
 3 Months Ended 6 Months Ended 12 Months Ended
Feb. 23, 2016
USD ($)
operating_segment
Nov. 22, 2015
Jan. 31, 2016
USD ($)
operating_segment
$ / shares
Jan. 31, 2016
USD ($)
operating_segment
$ / shares
Dec. 31, 2015
USD ($)
Feb. 18, 2016
$ / shares
shares
Jul. 31, 2015
USD ($)
$ / shares
Jan. 31, 2015
USD ($)
Jul. 31, 2014
USD ($)
Subsequent Event [Line Items]                  
Common stock, par value (in dollars per share) | $ / shares     $ 0.10 $ 0.10     $ 0.1    
Cash and cash equivalents, assuming payments of all transaction costs and outstanding debts paid or assumed     $ 163,466,000 $ 163,466,000     $ 150,953,000 $ 135,139,000 $ 154,500,000
Number of reportable operating segments | operating_segment     3 3          
TeleCommunication Systems, Inc.                  
Subsequent Event [Line Items]                  
Business Acquisition, Date of Acquisition Agreement   Nov. 22, 2015              
Revenue based on unaudited financial results         $ 360,000,000        
Subsequent Event                  
Subsequent Event [Line Items]                  
Number of reportable operating segments | operating_segment 2                
Subsequent Event | On a pro-forma combined basis | Minimum                  
Subsequent Event [Line Items]                  
Cash and cash equivalents, assuming payments of all transaction costs and outstanding debts paid or assumed $ 50,000,000                
Subsequent Event | New Credit Facility                  
Subsequent Event [Line Items]                  
Line of Credit Facility, maximum borrowing capacity 400,000,000                
Subsequent Event | New Credit Facility | On a pro-forma combined basis                  
Subsequent Event [Line Items]                  
Outstanding debt, credit facility $ 361,604,000                
Subsequent Event | TeleCommunication Systems, Inc.                  
Subsequent Event [Line Items]                  
Business Acquisition, Effective Date of Acquisition Feb. 23, 2016                
Business acquisition, transaction equity value $ 340,432,000                
Business acquisition, enterprise value 423,151,000                
Subsequent Event | TeleCommunication Systems, Inc. | On a pro-forma combined basis                  
Subsequent Event [Line Items]                  
Business Combination, Estimated Transaction and Merger Related Expenditures 48,000,000                
Subsequent Event | TeleCommunication Systems, Inc. | TCS                  
Subsequent Event [Line Items]                  
Business Combination, Cash and Cash Equivalents Acquired based on unaudited financial results 61,405,000                
Debt, including accrued interest, based on unaudited financial results $ 144,124,000                
Subsequent Event | Tender Offer | TeleCommunication Systems, Inc.                  
Subsequent Event [Line Items]                  
Business Acquisition, number of common stock validly tendered and not validly withdrawn in the tender offer (in shares) | shares           55,871,832      
Business Acquisition, Share Price (in dollars per share) | $ / shares           $ 5.00      
Business Acquisition, shares validly tendered and not validly withdrawn in the tender offer as a percentage of the acquiree's issued and outstanding common stock           88.32%      
Subsequent Event | Tender Offer | Class A Shares | TeleCommunication Systems, Inc.                  
Subsequent Event [Line Items]                  
Common stock, par value (in dollars per share) | $ / shares           $ 0.01      
Subsequent Event | Tender Offer | Class B Shares | TeleCommunication Systems, Inc.                  
Subsequent Event [Line Items]                  
Common stock, par value (in dollars per share) | $ / shares           $ 0.01