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Segment Information (Detail) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Segment Reporting Information        
Revenue $ 40,560 $ 33,691 $ 112,870 $ 100,358
Operating expenses 40,601 34,825 115,404 105,671
Gain on sales of intangible assets, net 1,047 713 3,739 5,434
Segment profit 1,006 (421) 1,205 121
Less reconciling items:        
Stock based compensation     6,901 12,439
Amortization of intangible assets from acquisitions 709 [1] 1,055 [1] 2,500 [1] 3,674 [1]
Acquisition and separation related costs 286 296 940 164
Income (loss) from continuing operations before provision for income taxes 987 (539) 1,157 (309)
Operating Segments
        
Segment Reporting Information        
Revenue 40,560 33,691 112,870 100,358
Operating expenses 37,241 29,772 105,089 89,438
Gain on sales of intangible assets, net 1,047 713 3,739 5,434
Segment profit 4,366 4,632 11,520 16,354
Less reconciling items:        
Stock based compensation 2,365 3,702 6,875 12,395
Amortization of intangible assets from acquisitions 709 1,055 2,500 3,674
Acquisition and separation related costs 286 296 940 164
Interest expense and other, net 19 118 48 430
Income (loss) from continuing operations before provision for income taxes 987 (539) 1,157 (309)
Operating Segments | Call-Driven
        
Segment Reporting Information        
Revenue 35,668 29,269 100,668 83,418
Operating expenses 33,978 27,070 96,127 79,534
Segment profit 1,690 2,199 4,541 3,884
Operating Segments | Archeo
        
Segment Reporting Information        
Revenue 4,892 4,422 12,202 16,940
Operating expenses 3,263 2,702 8,962 9,904
Gain on sales of intangible assets, net 1,047 713 3,739 5,434
Segment profit $ 2,676 $ 2,433 $ 6,979 $ 12,470
[1] Components of amortization of intangible assets from acquisitions: Service costs $ 2,737 $ 1,579 $ 748 $ 402 Sales and marketing 921 921 307 307 General and administrative 16 - - - Total $ 3,674 $ 2,500 $ 1,055 $ 709