Revenues

6 Months Ended

Jun. 30, 2019

Revenue from Contract with Customer [Abstract]

Revenues

REVENUES

The following tables present our revenues by Sales type as presented in our condensed consolidated statements of operations disaggregated by the timing of transfer of goods or services (in thousands, unaudited):

	For the Three Months Ended June 30,
	2019		2018
Product sales
Product transferred to customers at a point in time	$	67,992	$	75,720
Product transferred to customers over time	—		—
	$	67,992	$	75,720

	For the Six Months Ended June 30,
	2019		2018
Product sales
Product transferred to customers at a point in time	$	136,792	$	146,301
Product transferred to customers over time	—		—
	$	136,792	$	146,301

	For the Three Months Ended June 30,
	2019		2018
Service sales
Service transferred to customers at a point in time	$	12,581	$	9,907
Service transferred to customers over time	12,918		12,617
	$	25,499	$	22,524

	For the Six Months Ended June 30,
	2019		2018
Service sales
Service transferred to customers at a point in time	$	24,435	$	19,359
Service transferred to customers over time	25,881		25,418
	$	50,316	$	44,777

The following table presents our revenues disaggregated by geography, based on the billing addresses of our customers (in thousands, unaudited):

	For the Three Months Ended June 30,
	2019		2018
Total sales to external customers
United States	$	35,161	$	40,278
EMEA (1)	30,030		29,601
Other APAC (1)	15,387		15,799
China	8,961		9,145
Other Americas (1)	3,952		3,421
	$	93,491	$	98,244

	For the Six Months Ended June 30,
	2019		2018
Total sales to external customers
United States	$	71,008	$	77,580
EMEA (1)	61,130		59,281
Other APAC (1)	30,429		31,900
China	17,256		15,633
Other Americas (1)	7,285		6,684
	$	187,108	$	191,078

⁽¹⁾ Regions represent Europe, the Middle East, and Africa (EMEA); Asia-Pacific, excluding China (Other APAC); and Canada, Mexico, and Brazil (Other Americas).

For revenue related to our measurement and imaging equipment and related software, we allocate the contract price to performance obligations based on our best estimate of the standalone selling price. We make this allocation estimate utilizing data from the sale of our applicable products and services to customers separately in similar circumstances, with the exception of software licenses. With respect to software licenses, we use the residual method for allocating the contract price to performance obligations. Revenue related to our measurement and imaging equipment and related software is generally recognized upon shipment from our facilities or when delivered to the customer location, as determined by the agreed upon shipping terms, at which time we are entitled to payment and title and control has passed to the customer. Software arrangements generally include short-term maintenance that is considered post-contract support (“PCS”), which is considered to be a separate performance obligation. We generally establish a standalone sales price for this PCS component based on our maintenance renewal rate. Maintenance renewals, when sold, are recognized on a straight-line basis over the term of the maintenance agreement.  Payments for products and services are collected within a short period of time following transfer of control or commencement of delivery of services, as applicable.

Further, customers frequently purchase extended warranties with the purchase of measurement equipment and related software. Warranties are considered a performance obligation when services are transferred to a customer over time, and, as such, we recognize revenue on a straight-line basis over the warranty term. Extended warranty sales primarily include contract periods that extend between one month and three years.

We capitalize commission expenses related to deliverables transferred to a customer over time and amortize such costs ratably over the term of the contract. As of June 30, 2019, the deferred cost asset related to deferred commissions was approximately $2.9 million. For classification purposes, $2.0 million and $0.9 million are comprised within the Prepaid expenses and other current assets and Other long-term assets, respectively, on our condensed consolidated balance sheet as of June 30, 2019. As of June 30, 2018, the deferred cost asset related to deferred commissions was approximately $2.5 million. For classification purposes, $1.8 million and $0.7 million were comprised within the Prepaid expenses and other current assets and Other long-term assets, respectively, on our condensed consolidated balance sheet as of June 30, 2018.

The unearned service revenue liabilities reported on our condensed consolidated balance sheets reflect the contract liabilities to satisfy the remaining performance obligations for extended warranties and software maintenance. The current portion of unearned service revenues on our condensed consolidated balance sheets is what we expect to recognize to revenue within twelve months after the applicable balance sheet date relating to extended warranty and software maintenance contract liabilities. The Unearned service revenues - less current portion on our condensed consolidated balance sheets is what we expect to recognize to revenue extending beyond twelve months after the applicable balance sheet date relating to extended warranty and software maintenance contract liabilities. During the three and six months ended June 30, 2019, we recognized $8.8 million and $19.7 million, respectively, of service revenue that was deferred on our condensed consolidated balance sheet as of December 31, 2018. During the three and six months ended June 30, 2018, we recognized $7.2 million and $16.2 million, respectively, of service revenue that was deferred on our consolidated balance sheet as of December 31, 2017.

The nature of certain of our contracts gives rise to variable consideration, which may be constrained, primarily related to an allowance for sales returns and contracts with certain government customers. We are required to estimate the contract asset related to sales returns and record a corresponding adjustment to Cost of Sales. Our allowance for sales returns was approximately $0.1 million as of both June 30, 2019 and June 30, 2018.

Shipping and handling fees billed to customers in a sales transaction are recorded in Product Sales and shipping and handling costs incurred are recorded in Cost of Sales. We exclude from Sales any value-added sales and other taxes that we collect concurrently with revenue-producing activities.