General - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2018 USD ($)
Schedule Of Accounting Policies [Line Items]
Earliest timing of billings	in advance
Latest timing of billings	30 days
Estimated connection life between customer and trading partner	2 years
Set up fees recognized period	2 years
Maximum recognition period for miscellaneous one-time fee	1 year
Deferred commission expected amortization period	2 years
Impairment loss in relation to costs capitalized	$ 0
Analytics Platform [Member]
Schedule Of Accounting Policies [Line Items]
Set up fees recognized period	1 year
Minimum [Member]
Schedule Of Accounting Policies [Line Items]
Customer contract cancellation period	30 days
Current amount recognition period of set up fees	1 month
Long term amount recognition period of set up fees	13 months
Maximum [Member]
Schedule Of Accounting Policies [Line Items]
Customer contract cancellation period	90 days
Deferred revenue recognition period	1 year
Contract period for remaining performance obligations for contracts in which the optional exemption under ASC 606-10-50-14(a) was applied	1 year
Current amount recognition period of set up fees	12 months
Long term amount recognition period of set up fees	24 months