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,
	2018		2017
Product sales
Product transferred to customers at a point in time	$	75,720	$	62,533
Product transferred to customers over time	—		—
	$	75,720	$	62,533



	For the Six Months Ended June 30,
	2018		2017
Product sales
Product transferred to customers at a point in time	$	146,301	$	124,913
Product transferred to customers over time	—		—
	$	146,301	$	124,913



	For the Three Months Ended June 30,
	2018		2017
Service sales
Service transferred to customers at a point in time	$	9,907	$	8,530
Service transferred to customers over time	12,617		11,619
	$	22,524	$	20,149



	For the Six Months Ended June 30,
	2018		2017
Service sales
Service transferred to customers at a point in time	$	19,359	$	17,172
Service transferred to customers over time	25,418		22,159
	$	44,777	$	39,331

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,
	2018		2017
Net sales to external customers
United States	$	40,278	$	32,143
EMEA ⁽¹⁾	29,601		24,320
APAC ⁽¹⁾	24,944		22,882
Other Americas ⁽¹⁾	3,421		3,337
	$	98,244	$	82,682



	For the Six Months Ended June 30,
	2018		2017
Net sales to external customers
United States	$	77,580	$	63,913
EMEA ⁽¹⁾	59,281		49,280
APAC ⁽¹⁾	47,533		44,142
Other Americas ⁽¹⁾	6,684		6,909
	$	191,078	$	164,244

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