Award Timing Disclosure	12 Months Ended
Dec. 31, 2025
Award Timing Disclosures [Line Items]
Award Timing MNPI Disclosure	Equity Award Grant Policy We grant equity awards to our executive officers under our stockholder-approved 2005 Plan. Pursuant to this plan, all stock option grants must have a per share exercise price at least equal to the fair market value of our common stock on the grant date. Grants of equity awards to newly hired or appointed executive officers, including NEOs, will typically be made at a regularly scheduled meeting of the Compensation Committee held subsequent to the new hire or appointment date. Ongoing equity award grants to our executive officers, including our NEOs, will be approved on an annual basis at a meeting of the Compensation Committee or our Board of Directors, as applicable, which is typically held in the first quarter of each fiscal year. The Compensation Committee has not granted, nor does it intend in the future to grant, equity awards to our executive officers or any other individual in anticipation of the release of material nonpublic information that is likely to result in changes to the price of our common stock, such as a significant positive or negative earnings announcement. Similarly, Cohu has not timed, nor does it intend in the future to time, the release of material nonpublic information based on equity award grant dates. In addition, because our equity awards typically vest or are earned over a multi-year period, the value to recipients of any immediate increase in the price of our common stock following an award will be minimal. Treatment of Equity Awards Upon Retirement In March 2023, after consultation with Compensia and external legal counsel, the Compensation Committee approved a policy providing for the continuation of vesting eligibility after retirement for certain equity awards granted to specific senior executives that satisfy the eligibility requirements of a Qualifying Retiring Employee, as defined in our Retirement Policy which appears as an exhibit to applicable equity award agreements. These requirements include being a minimum age for retirement, having completed a minimum number of years of service with Cohu, including tenure as a senior executive, and providing specific advance notice of the request to receive retirement benefits. This policy does not apply to any equity awards granted before March 2023. This policy applies to all our NEOs including our CEO. We believe providing these potential retirement benefits will help us compete for and retain executive talent as well as facilitate orderly transitions for retiring executives.
Award Timing Method	The Compensation Committee has not granted, nor does it intend in the future to grant, equity awards to our executive officers or any other individual in anticipation of the release of material nonpublic information that is likely to result in changes to the price of our common stock, such as a significant positive or negative earnings announcement. Similarly, Cohu has not timed, nor does it intend in the future to time, the release of material nonpublic information based on equity award grant dates. In addition, because our equity awards typically vest or are earned over a multi-year period, the value to recipients of any immediate increase in the price of our common stock following an award will be minimal.
Award Timing Predetermined	false
Award Timing MNPI Considered	false
MNPI Disclosure Timed for Compensation Value	false

Award Timing Disclosure

12 Months Ended

Dec. 31, 2025

Award Timing Disclosures [Line Items]

Equity Award Grant Policy

We grant equity awards to our executive officers under our stockholder-approved 2005 Plan. Pursuant to this plan, all stock option grants must have a per share exercise price at least equal to the fair market value of our common stock on the grant date. Grants of equity awards to newly hired or appointed executive officers, including NEOs, will typically be made at a regularly scheduled meeting of the Compensation Committee held subsequent to the new hire or appointment date. Ongoing equity award grants to our executive officers, including our NEOs, will be approved on an annual basis at a meeting of the Compensation Committee or our Board of Directors, as applicable, which is typically held in the first quarter of each fiscal year.

The Compensation Committee has not granted, nor does it intend in the future to grant, equity awards to our executive officers or any other individual in anticipation of the release of material nonpublic information that is likely to result in changes to the price of our common stock, such as a significant positive or negative earnings announcement. Similarly, Cohu has not timed, nor does it intend in the future to time, the release of material nonpublic information based on equity award grant dates. In addition, because our equity awards typically vest or are earned over a multi-year period, the value to recipients of any immediate increase in the price of our common stock following an award will be minimal.

Treatment of Equity Awards Upon Retirement

In March 2023, after consultation with Compensia and external legal counsel, the Compensation Committee approved a policy providing for the continuation of vesting eligibility after retirement for certain equity awards granted to specific senior executives that satisfy the eligibility requirements of a Qualifying Retiring Employee, as defined in our Retirement Policy which appears as an exhibit to applicable equity award agreements. These requirements include being a minimum age for retirement, having completed a minimum number of years of service with Cohu, including tenure as a senior executive, and providing specific advance notice of the request to receive retirement benefits. This policy does not apply to any equity awards granted before March 2023. This policy applies to all our NEOs including our CEO. We believe providing these potential retirement benefits will help us compete for and retain executive talent as well as facilitate orderly transitions for retiring executives.

Award Timing Method

Award Timing Predetermined

false

Award Timing MNPI Considered

false

MNPI Disclosure Timed for Compensation Value

false