Share Repurchase Authorization	6 Months Ended
Jul. 01, 2023
Share Repurchase Program [Abstract]
Share Repurchase Authorization	NOTE 15. Share Repurchase Authorization In November 2020, the Onto Innovation Board of Directors approved a share repurchase authorization, which allows the Company to repurchase up to $100,000 worth of shares of its common stock. Repurchases may be made through both public market and private transactions from time to time with shares purchased being subsequently retired. During the three and six month periods ended July 1, 2023, the Company repurchased 0 and 46 shares of its common stock, respectively. The amount paid to repurchase the shares in excess of par value, including transaction costs, is recorded directly as a decrease to additional paid-in capital and accumulated earnings. At July 1, 2023, there was $31,577 available for future share repurchases under this share repurchase authorization.

Share Repurchase Authorization

6 Months Ended

Jul. 01, 2023

NOTE 15. Share Repurchase Authorization

In November 2020, the Onto Innovation Board of Directors approved a share repurchase authorization, which allows the Company to repurchase up to $100,000 worth of shares of its common stock. Repurchases may be made through both public market and private transactions from time to time with shares purchased being subsequently retired. During the three and six month periods ended July 1, 2023, the Company repurchased 0 and 46 shares of its common stock, respectively. The amount paid to repurchase the shares in excess of par value, including transaction costs, is recorded directly as a decrease to additional paid-in capital and accumulated earnings. At July 1, 2023, there was $31,577 available for future share repurchases under this share repurchase authorization.