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Acquisitions	3 Months Ended
Acquisitions	Mar. 31, 2021
Business Combinations [Abstract]
Acquisitions	Acquisitions OPI On July 30, 2020, the Company acquired the outstanding shares of OPI Photonics S.r.l. (OPI), an Italian limited liability company, for cash consideration of approximately $1.6 million, of which $0.2 million was paid at closing with the remaining $1.4 million to be paid over the next 24 months. The acquisition price was allocated to the tangible and identified intangible assets acquired and liabilities assumed as of the closing date of the acquisition based upon their respective fair values, and the excess of purchase price over the fair value amounts representing goodwill. The fair values assigned to assets acquired and liabilities assumed were based on management’s best estimates and assumptions as of the reporting date and are considered preliminary. Changes to amounts recorded as assets or liabilities may result in corresponding adjustments to goodwill. Pro forma financial information has not been provided for the purchase as it was not material to the Company’s overall financial position. During the three months ended March 31, 2021, accrued acquisition consideration of $0.3 million was paid to the sellers of OPI.