Revenue Recognition

6 Months Ended

Jun. 30, 2019

Revenue from Contract with Customer [Abstract]

The following table summarizes disaggregated revenue information by geographic area based upon the customer's country of domicile (in thousands):



	Three-months Ended				Six-months Ended
	June 30, 2019		July 1, 2018		June 30, 2019		July 1, 2018
Americas	$	78,500	$	71,812	$	143,656	$	131,029
Europe	58,881		70,366		118,538		126,569
Greater China	35,782		41,175		58,592		68,334
Other Asia	25,884		27,911		51,745		54,899
	$	199,047	$	211,264	$	372,531	$	380,831

The following table summarizes disaggregated revenue information by revenue type (in thousands):



	Three-months Ended				Six-months Ended
	June 30, 2019		July 1, 2018		June 30, 2019		July 1, 2018
Standard products and services	$	173,368	$	183,627	$	334,420	$	342,026
Application-specific customer solutions	25,679		27,637		38,111		38,805
	$	199,047	$	211,264	$	372,531	$	380,831

Costs to Fulfill a Contract

Costs to fulfill a contract are included in "Prepaid expenses and other current assets" on the Consolidated Balance Sheet and amounted to $6,852,000 and $3,514,000 as of June 30, 2019 and December 31, 2018, respectively.

Accounts Receivable, Contract Assets, and Contract Liabilities

Accounts receivable represent amounts billed and currently due from customers which are reported at their net estimated realizable value. The Company maintains reserves against its accounts receivable for potential credit losses. Credit losses recognized on accounts receivable were immaterial for the three-month and six-month periods ended June 30, 2019 and July 1, 2018, respectively. Contract assets consist of unbilled revenue which arises when revenue is recognized in advance of billing for certain application-specific customer solutions contracts. Contract liabilities consist of deferred revenue and customer deposits which arise when amounts are billed to or collected from customers in advance of revenue recognition.

The following table summarizes the deferred revenue and customer deposits activity for the six-month period ended June 30, 2019 (in thousands):



Balance as of December 31, 2018	$	9,845
Increases to deferred revenue and customer deposits	29,883
Recognition of revenue	(21,308		)
Foreign exchange rate changes	(88		)
Balance as of June 30, 2019	$	18,332

As a practical expedient, the Company has elected not to disclose the aggregate amount of the transaction price allocated to unsatisfied performance obligations, as our contracts have an original expected duration of less than one year.