On November 15, 2018, the Company completed the acquisition of 4D Technology Corporation (“4D”), an Arizona-based supplier of high-performance interferometric measurement inspection systems, for $42.6 million.

4D’s Dynamic Interferometry® solutions are used in a variety of industries to provide accurate shape and surface measurement data, which provides feedback to customers of optical quality, machine finish, and surface defectivity, to improve manufacturing yield and performance. The addition of 4D’s technology added new technology to the Company’s portfolio, expanded its served markets with new applications in the scientific research, aerospace, industrial and optics manufacturing markets.

The following table presents the preliminary purchase price allocation as of November 15, 2018. Since the acquisition date, no measurement period adjustments have yet been recorded; accordingly, such adjustments as of March 30, 2019 have been omitted from the table (in thousands):

	Preliminary Allocation November 15, 2018
Cash and cash equivalents	$	1,414
Accounts receivable, net		4,156
Inventories		4,563
Prepaid and other current assets		104
Property and equipment		145
Accounts payable		(702	)
Accrued liabilities		(760	)
Deferred revenue		(197	)
Deferred tax liabilities		(5,408	)
Total assets acquired/liabilities assumed		3,315
Developed technology		15,500
In-process research and development		1,400
Customer relationships		4,600
Order backlog		500
Trade name		1,500
Total identified intangible assets		23,500
Total identifiable net assets		26,815
Goodwill		15,762
Total purchase consideration	$	42,577