10. Geographical Information

The Company operates in one operating and reportable segment as the nature of the Company’s products and production processes, as well as type of customers and distribution methods, is consistent among all of the Company’s products and is engaged in the development, manufacture and supply of critical subsystems for the semiconductor capital equipment, consumer, medical, energy, industrial, flat panel and research industries. The Company’s foreign operations are conducted primarily through its wholly-owned subsidiaries in China, Singapore and the Czech Republic. The Company’s principal markets include North America, Asia and Europe. Sales by geographic area represent sales to unaffiliated customers and are based upon the location to which the products were shipped. The following table sets forth revenue by geographic area (in thousands):

	Three Months Ended				Six Months Ended
	June 30,		June 24,		June 30,		June 24,
	2017		2016		2017		2016
United States	$	129,349	$	67,891	$	233,705	$	133,730
China		5,166		1,185		18,113		4,632
Singapore		73,810		43,359		134,050		76,043
Austria		8,491		9,309		19,712		17,811
Other		11,445		8,087		27,275		9,844
	$	228,261	$	129,831	$	432,855	$	242,060

At June 30, 2017, approximately $6.5 million and $1.6 million of the Company’s net long-lived assets were located in Asia and the Czech Republic, respectively, and the remaining balances were located in the United States. At June 24, 2016, approximately $8.0 million and $1.9 million of the Company’s net long-lived assets were located in Asia and the Czech Republic, respectively, and the remaining balances were located in the United States.