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Net Loss Per Share (Anti–Dilutive Common Share Equivalents) (Details) - shares
3 Months Ended
Jul. 25, 2016
Mar. 31, 2017
Mar. 31, 2016
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Anti–dilutive common share equivalents (in shares)   2,142,218 1,735,138
Website Analytic Business [Member]      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Numbers of share issued in acquisition (in shares) 318,302    
Employee Stock Option [Member]      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Anti–dilutive common share equivalents (in shares)   731,971 751,201
Restricted Stock [Member]      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Anti–dilutive common share equivalents (in shares)   1,410,247 983,937