Subsequent Events	3 Months Ended
Mar. 26, 2021
Subsequent Events [Abstract]
Subsequent Events	17. SUBSEQUENT EVENTS Acquisition On March 31, 2021, the Company completed the acquisition of Ham-Let, a public company organized under the laws of the State of Israel (not a U.S. registrant), pursuant to an Agreement and Plan of Merger (the “Merger Agreement”), for approximately $351.0 million in cash. The Company’s primary reason for this acquisition is to broaden UCT’s semiconductor serviceable available market and provides access to a new set of customers in the semiconductor fab infrastructure and sub-fab market. In connection with the consummation of the acquisition, the Company entered into a Second Amendment dated March 31, 2021 to the Credit Agreement dated as of August 27, 2018, and amended as of October 1, 2018, to refinance and reprice its approximately $273.0 million of existing term B borrowings that will remain outstanding and obtain a $355.0 million senior secured incremental term loan B facility (the “Incremental Term Loan”) with Barclays Bank PLC, which increased the amount of term loan indebtedness outstanding under the Company’s Credit Agreement. The Incremental Term Loan has a maturity date of August 27, 2025, with monthly interest payments in arrears, quarterly principal payments of 0.625% of the original outstanding principal balance payable beginning July 2021, with the remaining principal balance paid upon maturity. The Term Loan accrues interest at a rate equal to a base LIBOR rate determined by reference to the London interbank offered rate for dollars, plus 3.75% (subject to certain adjustments quarterly based upon the Company’s consolidated leverage ratio). The Incremental Term Loan, together with cash on hand, was used to finance the acquisition, to refinance the existing debt of Ham-Let and to pay fees and expenses incurred in connection with the Incremental Term Loan and the acquisition of Ham-Let. Equity Financing On April 13, 2021, the Company completed an underwritten public offering of 3,181,818 shares of the Company’s common stock, in which the Company received net proceeds of approximately $167.6 million, after deducting the underwriting discounts and offering expenses payable by the Company. On April 29, 2021, the Underwriters exercised the option to purchase an additional 477,272 shares of the Company’s common stock for approximately $25.2 million in cash. The Company intends to use the net proceeds from this offering for general corporate purposes, which may include working capital, sales and marketing activities, product development, general and administrative matters, and capital expenditures. The Company may use a portion of the net proceeds to acquire complementary businesses, products, services, or technologies, although it has no agreements, commitments, or plans for any specific acquisitions at this time.

Subsequent Events

3 Months Ended

Mar. 26, 2021

17. SUBSEQUENT EVENTS

Acquisition

On March 31, 2021, the Company completed the acquisition of Ham-Let, a public company organized under the laws of the State of Israel (not a U.S. registrant), pursuant to an Agreement and Plan of Merger (the “Merger Agreement”), for approximately $351.0 million in cash. The Company’s primary reason for this acquisition is to broaden UCT’s semiconductor serviceable available market and provides access to a new set of customers in the semiconductor fab infrastructure and sub-fab market.

In connection with the consummation of the acquisition, the Company entered into a Second Amendment dated March 31, 2021 to the Credit Agreement dated as of August 27, 2018, and amended as of October 1, 2018, to refinance and reprice its approximately $273.0 million of existing term B borrowings that will remain outstanding and obtain a $355.0 million senior secured incremental term loan B facility (the “Incremental Term Loan”) with Barclays Bank PLC, which increased the amount of term loan indebtedness outstanding under the Company’s Credit Agreement. The Incremental Term Loan has a maturity date of August 27, 2025, with monthly interest payments in arrears, quarterly principal payments of 0.625% of the original outstanding principal balance payable beginning July 2021, with the remaining principal balance paid upon maturity. The Term Loan accrues interest at a rate equal to a base LIBOR rate determined by reference to the London interbank offered rate for dollars, plus 3.75% (subject to certain adjustments quarterly based upon the Company’s consolidated leverage ratio).

The Incremental Term Loan, together with cash on hand, was used to finance the acquisition, to refinance the existing debt of Ham-Let and to pay fees and expenses incurred in connection with the Incremental Term Loan and the acquisition of Ham-Let.

Equity Financing

On April 13, 2021, the Company completed an underwritten public offering of 3,181,818 shares of the Company’s common stock, in which the Company received net proceeds of approximately $167.6 million, after deducting the underwriting discounts and offering expenses payable by the Company. On April 29, 2021, the Underwriters exercised the option to purchase an additional 477,272 shares of the Company’s common stock for approximately $25.2 million in cash. The Company intends to use the net proceeds from this offering for general corporate purposes, which may include working capital, sales and marketing activities, product development, general and administrative matters, and capital expenditures. The Company may use a portion of the net proceeds to acquire complementary businesses, products, services, or technologies, although it has no agreements, commitments, or plans for any specific acquisitions at this time.