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Business Acquisition, number of common stock validly tendered and not validly withdrawn in the tender offer (in shares) | shares						55,871,832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