Segment Reporting (Tables)

3 Months Ended

Apr. 30, 2019

Segment Reporting [Abstract]

Company's Revenue by Geographic Region Based on Bill-to Location

The following table sets forth the Company’s revenue by geographic region based on bill-to location for the periods indicated:

	Three Months Ended April 30,
	2019		2018
	(in thousands)
Taiwan	$	27,600	$	33,206
Asia Pacific		14,488		16,356
Europe		3,483		4,582
North America other than United States		883		2,006
United States		734		788
Total revenue	$	47,188	$	56,938