Basis of Presentation and Significant Accounting Policies (Policies)	9 Months Ended
Oct. 02, 2020
Accounting Policies [Abstract]
Basis of Presentation	The Condensed Consolidated Financial Statements of the Company present the financial position, results of operations, and cash flows of STAAR Surgical Company and its wholly owned subsidiaries. All significant intercompany accounts and transactions have been eliminated. The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States (“GAAP”) for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X of the Securities Exchange Commission. In accordance with those rules and regulations certain information and footnote disclosures normally included in the Comprehensive Financial Statements have been condensed or omitted pursuant to such rules and regulations. The Consolidated Balance Sheet as of January 3, 2020 was derived from the audited financial statements at that date, but does not include all the information and footnotes required by GAAP. These financial statements should be read in conjunction with the audited financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the year ended January 3, 2020. The Condensed Consolidated Financial Statements for the three and nine months ended October 2, 2020 and September 27, 2019, in the opinion of management, include all adjustments, consisting only of normal recurring adjustments, necessary for a fair presentation of the Company’s financial condition and results of operations. The results of operations for the three and nine months ended October 2, 2020 and September 27, 2019, are not necessarily indicative of the results to be expected for any other interim period or for the entire year. Each of the Company’s fiscal reporting periods ends on the Friday nearest to the quarter ending date and generally consists of 13 weeks. Unless the context indicates otherwise “we,” “us,” the “Company,” and “STAAR” refer to STAAR Surgical Company and its consolidated subsidiaries.
Vendor Concentration	Vendor Concentration There were two vendors which accounted for over 29% of the Company’s consolidated accounts payable as of October 2, 2020. There was one vendor which accounted for over 11% of the Company’s consolidated accounts payable as of January 3, 2020. There was one vendor who accounted for over 10% of the Company’s consolidated purchases for the three months ended October 2, 2020. There were no vendors who accounted for over 10% of the Company’s consolidated purchases for the nine months ended October 2, 2020.
Use of Estimates	Use of Estimates During the COVID-19 pandemic, the Company believes it has used reasonable estimates and assumptions in determining valuation allowances for uncollectible trade receivables, sales returns reserves, obsolete and excess inventory reserves, deferred income taxes, and tax reserves, including valuation allowances for deferred tax assets, pension liabilities, evaluation of asset impairment, in determining the useful life of depreciable and definite-lived intangible assets, and in the variables and assumptions used to calculate and record stock-based compensation. Throughout the COVID-19 pandemic the Company offered extended payment terms to assist its surgeon customers and their clinics as they resumed business. During the quarter ended October 2, 2020, the Company has experienced improvements in customer payments and is unaware of any material impairment of customer receivables. The Company’s sales representatives throughout the world remain engaged with customers conducting online training and other educational courses which have been very well attended. This activity has given the Company insight into COVID-19’s impact on customers and potential impairment of receivables.
Recently Adopted Accounting Pronouncements and Recent Accounting Pronouncements Not Yet Adopted	Recently Adopted Accounting Pronouncements and Recent Accounting Pronouncements Not Yet Adopted On January 4, 2020 (beginning of fiscal year 2020), the Company adopted Accounting Standards Update (“ASU”) 2016‑13, “Financial Instruments – Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments,” which (i) significantly changes the impairment model for most financial assets that are measured at amortized cost and certain other instruments from an incurred loss model to an expected loss model; and (ii) provides for recording credit losses on available-for-sale debt securities through an allowance account. ASU 2016-13 also requires certain incremental disclosures. Subsequently, the FASB issued ASU 2018-19, ASU 2019-04, ASU 2019-05, ASU 2020-02 and ASU 2020-03 to clarify and improve ASU 2016-13. The adoption of ASU 2016-13 did not have a material impact on the Condensed Consolidated Financial Statements. Note 1 — Basis of Presentation and Significant Accounting Policies (Continued) Recently Adopted Accounting Pronouncements and Recent Accounting Pronouncements Not Yet Adopted (Continued) On January 4, 2020 (beginning of fiscal year 2020), the Company adopted ASU 2018-13, “Fair Value Measurement (Topic 820): Disclosure Framework – Changes to the Disclosure Requirements for Fair Value Measurement,” which modifies certain disclosures requirements for reporting fair value measurements. The adoption of ASU 2018-13 did not have a material impact on the Condensed Consolidated Financial Statements. On January 4, 2020 (beginning of fiscal year 2020), the Company adopted ASU 2018-14, “Compensation – Retirement Benefits – Defined Benefit Plans – General (Subtopic 715-20); Disclosure Framework – Changes in the Disclosure Requirement for Defined Benefit Plans,” which modifies disclosure requirements for employers that sponsor defined benefit pension or other post retirement plans. The adoption of ASU 2018-14 did not have a material impact on the Condensed Consolidated Financial Statements. In December 2019, the FASB issued ASU 2019-12, “Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes.” ASU 2019-12 removes the following exceptions: exception to the incremental approach for intra period tax allocation; exception to accounting for basis differences when there are ownership changes in foreign investments; and exception to interim period tax accounting for year to date losses that exceed anticipated losses. ASU 2019-12 also improves financial reporting for franchise taxes that are partially based on income; transactions with a government that result in a step up in the tax basis of goodwill; separate financial statements of legal entities that are not subject to tax; and enacted changes in tax laws in interim periods. ASU 2019-12 is effective for fiscal years beginning after December 15, 2020 and interim periods within those fiscal years. Early adoption is permitted. The Company will adopt this standard as of January 2, 2021 (beginning of fiscal year 2021) and is currently evaluating the disclosure requirements and its effect on the Condensed Consolidated Financial Statements.

Basis of Presentation and Significant Accounting Policies (Policies)

9 Months Ended

Oct. 02, 2020

The Condensed Consolidated Financial Statements of the Company present the financial position, results of operations, and cash flows of STAAR Surgical Company and its wholly owned subsidiaries. All significant intercompany accounts and transactions have been eliminated. The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States (“GAAP”) for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X of the Securities Exchange Commission. In accordance with those rules and regulations certain information and footnote disclosures normally included in the Comprehensive Financial Statements have been condensed or omitted pursuant to such rules and regulations. The Consolidated Balance Sheet as of January 3, 2020 was derived from the audited financial statements at that date, but does not include all the information and footnotes required by GAAP. These financial statements should be read in conjunction with the audited financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the year ended January 3, 2020.

The Condensed Consolidated Financial Statements for the three and nine months ended October 2, 2020 and September 27, 2019, in the opinion of management, include all adjustments, consisting only of normal recurring adjustments, necessary for a fair presentation of the Company’s financial condition and results of operations. The results of operations for the three and nine months ended October 2, 2020 and September 27, 2019, are not necessarily indicative of the results to be expected for any other interim period or for the entire year.

Each of the Company’s fiscal reporting periods ends on the Friday nearest to the quarter ending date and generally consists of 13 weeks. Unless the context indicates otherwise “we,” “us,” the “Company,” and “STAAR” refer to STAAR Surgical Company and its consolidated subsidiaries.

Vendor Concentration

There were two vendors which accounted for over 29% of the Company’s consolidated accounts payable as of October 2, 2020. There was one vendor which accounted for over 11% of the Company’s consolidated accounts payable as of January 3, 2020. There was one vendor who accounted for over 10% of the Company’s consolidated purchases for the three months ended October 2, 2020. There were no vendors who accounted for over 10% of the Company’s consolidated purchases for the nine months ended October 2, 2020.

Use of Estimates

During the COVID-19 pandemic, the Company believes it has used reasonable estimates and assumptions in determining valuation allowances for uncollectible trade receivables, sales returns reserves, obsolete and excess inventory reserves, deferred income taxes, and tax reserves, including valuation allowances for deferred tax assets, pension liabilities, evaluation of asset impairment, in determining the useful life of depreciable and definite-lived intangible assets, and in the variables and assumptions used to calculate and record stock-based compensation. Throughout the COVID-19 pandemic the Company offered extended payment terms to assist its surgeon customers and their clinics as they resumed business. During the quarter ended October 2, 2020, the Company has experienced improvements in customer payments and is unaware of any material impairment of customer receivables. The Company’s sales representatives throughout the world remain engaged with customers conducting online training and other educational courses which have been very well attended. This activity has given the Company insight into COVID-19’s impact on customers and potential impairment of receivables.

Recently Adopted Accounting Pronouncements and Recent Accounting Pronouncements Not Yet Adopted

On January 4, 2020 (beginning of fiscal year 2020), the Company adopted Accounting Standards Update (“ASU”) 2016‑13, “Financial Instruments – Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments,” which (i) significantly changes the impairment model for most financial assets that are measured at amortized cost and certain other instruments from an incurred loss model to an expected loss model; and (ii) provides for recording credit losses on available-for-sale debt securities through an allowance account. ASU 2016-13 also requires certain incremental disclosures. Subsequently, the FASB issued ASU 2018-19, ASU 2019-04, ASU 2019-05, ASU 2020-02 and ASU 2020-03 to clarify and improve ASU 2016-13. The adoption of ASU 2016-13 did not have a material impact on the Condensed Consolidated Financial Statements.

Note 1 — Basis of Presentation and Significant Accounting Policies (Continued)

Recently Adopted Accounting Pronouncements and Recent Accounting Pronouncements Not Yet Adopted (Continued)

On January 4, 2020 (beginning of fiscal year 2020), the Company adopted ASU 2018-13, “Fair Value Measurement (Topic 820): Disclosure Framework – Changes to the Disclosure Requirements for Fair Value Measurement,” which modifies certain disclosures requirements for reporting fair value measurements. The adoption of ASU 2018-13 did not have a material impact on the Condensed Consolidated Financial Statements.

On January 4, 2020 (beginning of fiscal year 2020), the Company adopted ASU 2018-14, “Compensation – Retirement Benefits – Defined Benefit Plans – General (Subtopic 715-20); Disclosure Framework – Changes in the Disclosure Requirement for Defined Benefit Plans,” which modifies disclosure requirements for employers that sponsor defined benefit pension or other post retirement plans. The adoption of ASU 2018-14 did not have a material impact on the Condensed Consolidated Financial Statements.

In December 2019, the FASB issued ASU 2019-12, “Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes.” ASU 2019-12 removes the following exceptions: exception to the incremental approach for intra period tax allocation; exception to accounting for basis differences when there are ownership changes in foreign investments; and exception to interim period tax accounting for year to date losses that exceed anticipated losses. ASU 2019-12 also improves financial reporting for franchise taxes that are partially based on income; transactions with a government that result in a step up in the tax basis of goodwill; separate financial statements of legal entities that are not subject to tax; and enacted changes in tax laws in interim periods. ASU 2019-12 is effective for fiscal years beginning after December 15, 2020 and interim periods within those fiscal years. Early adoption is permitted. The Company will adopt this standard as of January 2, 2021 (beginning of fiscal year 2021) and is currently evaluating the disclosure requirements and its effect on the Condensed Consolidated Financial Statements.