Revenues (Tables)

3 Months Ended

Mar. 31, 2021

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,
	2021		2020
Product sales
Product transferred to customers at a point in time	$	50,870	$	53,554
Product transferred to customers over time	3,765		2,971
	$	54,635	$	56,525

	For the Three Months Ended March 31,
	2021		2020
Service sales
Service transferred to customers at a point in time	$	9,997	$	10,996
Service transferred to customers over time	11,699		11,994
	$	21,696	$	22,990

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,
	2021		2020
Total sales to external customers
Americas (1)	$	32,549	$	35,590
EMEA (1)	25,454		23,690
APAC (1)	18,328		20,235
	$	76,331	$	79,515

(1) Regions represent North America and South America (Americas); Europe, the Middle East, and Africa (EMEA); and the Asia-Pacific (APAC).