XML 38 R16.htm IDEA: XBRL DOCUMENT
v3.20.4

Restructuring Charges | 12 Months Ended
--- | ---
Dec. 31, 2020
Restructuring Charges |
Restructuring Charges | Note 9 — Restructuring Charges ​ During the second quarter of 2018, the Company initiated plans to reduce excess capacity associated with the manufacture and support of the Company’s advanced packaging lithography and 3D wafer inspection systems by consolidating these operations into its San Jose, California facility. As a result of this and other cost saving initiatives, the Company announced headcount reductions of approximately 40 employees. ​ In the second half of 2019, the Company executed an initiative to reorganize various functions along product lines and created a central research and development organization to better allocate its resources to the Company’s highest priority projects. In addition, the Company delayered the organization. Collectively, these actions impacted approximately 60 employees. During the year ended December 31, 2020, additional accruals were recognized and payments were made related to these restructuring initiatives, which are largely completed at December 31, 2020. ​ The following table shows the amounts incurred and paid for restructuring activities during the years ended December 31, 2020, 2019, and 2018 and the remaining accrued balance of restructuring costs at December 31, 2020, which is included in “Accrued expenses and other current liabilities” in the Consolidated Balance Sheets: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Personnel |  | Facility |  | ​ | ​
​ | ​ | Severance and | ​ | Related Costs | ​ | ​ | ​
​ | ​ | Related Costs | ​ | and Other | ​ | ​ | Total
​ | ​ | (in thousands)
Balance - December 31, 2017 | ​ | $ | 1,520 | ​ | $ | — | ​ | $ | 1,520
Provision | ​ |  | 4,681 | ​ |  | 2,714 | ​ |  | 7,395
Payments | ​ |  | (4,058) | ​ |  | (2,644) | ​ |  | (6,702)
Balance - December 31, 2018 | ​ |  | 2,143 | ​ | ​ | 70 | ​ | ​ | 2,213
Provision | ​ |  | 5,803 | ​ | ​ | 203 | ​ | ​ | 6,006
Payments | ​ |  | (5,105) | ​ | ​ | (273) | ​ | ​ | (5,378)
Balance - December 31, 2019 | ​ | ​ | 2,841 | ​ | ​ | — | ​ | ​ | 2,841
Provision | ​ | ​ | 1,097 | ​ | ​ | — | ​ | ​ | 1,097
Payments | ​ | ​ | (3,659) | ​ | ​ | — | ​ | ​ | (3,659)
Balance - December 31, 2020 | ​ | $ | 279 | ​ | $ | — | ​ | $ | 279
​ Restructuring expense for the years ended December 31, 2019 and 2018 included non-cash charges of $0.4 million and $1.2 million, respectively, which are excluded from the table above, related to accelerated share-based compensation for employee terminations.

X
- References No definition available. + Details
Name: | us-gaap_RestructuringAndRelatedActivitiesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The entire disclosure for restructuring and related activities. Description of restructuring activities such as exit and disposal activities, include facts and circumstances leading to the plan, the expected plan completion date, the major types of costs associated with the plan activities, total expected costs, the accrual balance at the end of the period, and the periods over which the remaining accrual will be settled. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -URI http://asc.fasb.org/topic&trid=2175745 + Details
Name: | us-gaap_RestructuringAndRelatedActivitiesDisclosureTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration