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
	March 31,		March 25,
	2017		2016
United States	$	104,356	$	65,839
China		12,947		3,447
Singapore		60,240		32,684
Austria		11,221		8,502
Other		15,830		1,757
	$	204,594	$	112,229

At March 31, 2017, approximately $6.9 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 March 25, 2016, approximately $8.5 million and $1.8 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.