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Revenue (Tables)

12 Months Ended

Dec. 31, 2018

Revenue From Contract With Customer [Abstract]

Summary of Revenues by Revenue Stream

We derive our revenues primarily from the following revenue streams (in thousands):  

		Year Ended December 31,
		2018				2017				2016
Recurring revenues:
Fulfillment		$	190,783			$	164,682			$	139,645
Analytics			34,447				34,260				32,938
Other			5,424				4,978				4,474
Recurring Revenues			230,654				203,920				177,057
One-time revenues			17,586				16,165				16,096
		$	248,240			$	220,085			$	193,153

Summary of Deferred Revenue Liability Relating to Set-Up Fees

The table below presents the activity of the portion of the deferred revenue liability relating to set-up fees (in thousands):

		Year Ended December 31,
		2018				2017
Balances, at beginning of period		$	10,031			$	9,995
Invoiced set-up fees			10,271				10,625
Amortized set-up fees			(10,445	)			(10,589	)
Balances, at end of period		$	9,857			$	10,031

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- Definition

Tabular disclosure of contract balances and changes in contract balances.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130551-203045

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- Definition

Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
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