Revenues (Tables)

3 Months Ended

Mar. 31, 2020

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

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 March 31,
	2020		2019
Product sales
Product transferred to customers at a point in time	$	53,554	$	68,975
Product transferred to customers over time	2,971		2,603
	$	56,525	$	71,578

	For the Three Months Ended March 31,
	2020		2019
Service sales
Service transferred to customers at a point in time	$	10,996	$	11,680
Service transferred to customers over time	11,994		10,359
	$	22,990	$	22,039

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 March 31,
	2020		2019
Total sales to external customers
United States	$	33,091	$	35,848
EMEA (1)	23,690		31,100
Other APAC (1)	15,487		15,042
China	4,748		8,295
Other Americas (1)	2,499		3,332
	$	79,515	$	93,617

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