Revenue - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
Revenue [Line Items]
Incremental direct costs of obtaining a contract, practical expedient	true
Effects of a financing component, practical expedient	true
Remaining performance obligation for contracts, optional exemption	true
Adoption of Topic 606
Revenue [Line Items]
Contract liabilities	$ 6.5	$ 3.6
Revenue recognized		$ 3.3
Warranties
Revenue [Line Items]
Standard product warranty description	The Company generally provides warranties for its products. The standard warranty period is typically 12 months to 24 months for the Photonics and Precision Motion segments and 12 months to 36 months for the Vision segment. The standard warranty period for product sales is accounted for under the provisions of ASC 450, “Contingencies,” as the Company has the ability to ascertain the likelihood of the liability and can reasonably estimate the amount of the liability.
Maximum
Revenue [Line Items]
Percentage of revenue for professional services	3.00%
Duration of professional services performed under customer contract	1 month
Maximum \| Photonics and Precision Motion \| Warranties
Revenue [Line Items]
Standard warranty period on products	24 months
Maximum \| Vision \| Warranties
Revenue [Line Items]
Standard warranty period on products	36 months
Minimum \| Photonics and Precision Motion \| Warranties
Revenue [Line Items]
Standard warranty period on products	12 months
Minimum \| Vision \| Warranties
Revenue [Line Items]
Standard warranty period on products	12 months

Percentage of revenue for professional services requested under customer contract is recognized.

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- Definition

Period when revenue for professional and engineering services requested under customer contract is recognized.

+ References

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- Definition

Standard warranty period on products.

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- Definition

Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Indicates (true false) whether practical expedient was elected not to adjust consideration for effect of financing component when transfer and customer payment for product or service occurs within one year or less.

+ References

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Indicates (true false) whether practical expedient was elected to recognize incremental cost of obtaining contract as expense when incurred if amortization period would have been one year or less.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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Indicates (true false) whether optional exemption was applied not to disclose amount of transaction price allocated to and explanation of expected timing of revenue recognition for remaining performance obligation, when contract has expected duration of one year or less or right to consideration corresponds directly to performance completed.

+ References

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- Definition

Describes the nature of the product warranty, including the approximate term of the product warranty, how the product warranty arose, and the events or circumstances that would require the warrantor to perform under the product warranty.

+ References

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