Description of Business, Basis of Presentation and Significant Accounting Policy (Policies)	6 Months Ended
Jun. 27, 2020
Policy Text Block [Abstract]
Government Grants and Credits	Government Grants and Credits The Company generally records grants from governmental agencies related to income as a reduction in operating expense. Grants are recognized when there is reasonable assurance that the Company will comply with the conditions attached to the grant arrangement and the grant will be received. Reimbursements of eligible expenditures pursuant to government assistance programs are recorded as reductions of operating costs when the related costs have been incurred and there is reasonable assurance regarding collection of the claim. Grant claims not settled by the balance sheet date are recorded as receivables, provided their receipt is reasonably assured. The determination of the amount of the claim, and accordingly the receivable amount, requires management to make calculations based on its interpretation of eligible expenditures in accordance with the terms of the programs. The reimbursement claims submitted by the Company are subject to review by the relevant government agencies. In Singapore, Intevac receives government assistance under the Job Support Scheme (“JSS”). During the quarter ended June 27, 2020, the Company received $310,000 in JSS grants, of which $180,000 is reported as a reduction of cost of net revenues, $49,000 is reported as a reduction of research and development (“R&D”) expenses and $81,000 is reported as a reduction of selling, general and administrative expenses on the condensed consolidated statements of operations.

The Company generally records grants from governmental agencies related to income as a reduction in operating expense. Grants are recognized when there is reasonable assurance that the Company will comply with the conditions attached to the grant arrangement and the grant will be received. Reimbursements of eligible expenditures pursuant to government assistance programs are recorded as reductions of operating costs when the related costs have been incurred and there is reasonable assurance regarding collection of the claim. Grant claims not settled by the balance sheet date are recorded as receivables, provided their receipt is reasonably assured. The determination of the amount of the claim, and accordingly the receivable amount, requires management to make calculations based on its interpretation of eligible expenditures in accordance with the terms of the programs. The reimbursement claims submitted by the Company are subject to review by the relevant government agencies. In Singapore, Intevac receives government assistance under the Job Support Scheme (“JSS”). During the quarter ended June 27, 2020, the Company received $310,000 in JSS grants, of which $180,000 is reported as a reduction of cost of net revenues, $49,000 is reported as a reduction of research and development (“R&D”) expenses and $81,000 is reported as a reduction of selling, general and administrative expenses on the condensed consolidated statements of operations.