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Operating Results for Discontinued Operations (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Expenses:        
Discontinued operations, net of tax $ 200 $ 972 $ 27,279 $ 2,986
Archeo's Pay-Per-Click Advertising Services and Archeo's Domain Operations        
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Revenue   1,943 7,081 6,979
Expenses:        
Service costs   785 1,663 2,502
Sales and marketing   126 334 388
Income from discontinued operations before provision for income taxes   1,032 5,084 4,089
Income tax expense (benefit) (37) 338   1,381
Discontinued operations, net of tax $ 37 $ 694 $ 5,084 $ 2,708