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Summary of Final Purchase Price Allocation for Acquisition (Detail) (USD $)
In Thousands, unless otherwise specified
0 Months Ended 9 Months Ended
Sep. 30, 2014
Dec. 31, 2013
Oct. 09, 2013
Antenna
Sep. 30, 2014
Antenna
Total purchase consideration:        
Cash     $ 27,100 $ 27,141
Allocation of the purchase consideration:        
Cash       783
Accounts receivable, net of allowance       4,184
Other assets       3,951
Property and equipment       655
Deferred tax assets, net       2,638
Identifiable intangible assets 10,355     10,355
Goodwill 45,009 43,469   23,018
Accounts payable       (1,396)
Accrued liabilities       (12,861)
Deferred revenue       (4,186)
Net assets acquired       $ 27,141