XML 53 R41.htm IDEA: XBRL DOCUMENT
v3.22.0.1

Stockholders' Equity (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2021
Stockholders Equity Note [Abstract] |
Schedule of Share-based Compensation, Fair Value of Stock-Based Compensation Granted | The following table represents the fair value of stock-based compensation granted during the year ended 2021 (in thousands):
|  | Fair Value |
Stock options |  | $ | 12,309 |
RSUs |  |  | 6,661 |
Restricted stock |  |  | 466 |
Total stock-based compensation expense |  | $ | 19,436 |
Schedule of Compensation Cost | The Company recorded stock-based compensation expense by award as follows (in thousands):
|  | Years Ended |
|  | 2021 |  |  | 2020 |  |  | 2019 |
Employee stock option |  | $ | 10,373 |  |  | $ | 9,577 |  |  | $ | 8,144 |
Restricted stock |  |  | 616 |  |  |  | 428 |  |  |  | 320 |
RSUs |  |  | 2,667 |  |  |  | 1,732 |  |  |  | 1,905 |
PSUs |  |  | 371 |  |  |  | 147 |  |  |  | — |
Nonemployee stock options |  |  | 578 |  |  |  | 262 |  |  |  | 178 |
Total stock-based compensation expense |  | $ | 14,605 |  |  | $ | 12,146 |  |  | $ | 10,547 |
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs | The Company recorded stock-based compensation expense in the following categories (in thousands):
|  | Years Ended |
|  | 2021 |  |  | 2020 |  |  | 2019 |
Cost of sales |  | $ | 215 |  |  | $ | 112 |  |  | $ | 52 |
General and administrative |  |  | 6,495 |  |  |  | 4,925 |  |  |  | 4,010 |
Selling and marketing |  |  | 3,454 |  |  |  | 3,471 |  |  |  | 3,318 |
Research and development |  |  | 4,441 |  |  |  | 3,638 |  |  |  | 3,167 |
Total stock-based compensation expense, net |  |  | 14,605 |  |  |  | 12,146 |  |  |  | 10,547 |
Amounts capitalized as part of inventory |  |  | 1,295 |  |  |  | 1,129 |  |  |  | 1,017 |
Total stock-based compensation expense, gross |  | $ | 15,900 |  |  | $ | 13,275 |  |  | $ | 11,564 |
Schedule of Unrecognized Compensation Cost, Non-Vested Stock-Based Compensation Arrangements | As of December 31, 2021, total unrecognized compensation cost related to non-vested stock-based compensation arrangements granted under the Plan were as follows (in thousands):
|  | 2021 |
Stock options |  | $ | 12,682 |
Restricted stock, RSUs and PSUs |  |  | 6,981 |
Total unrecognized stock-based compensation cost |  | $ | 19,663 |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions | The risk-free rate is based on the U.S. Treasury yield curve corresponding to the expected term at the time of the grant.
|  | Years Ended |
|  | 2021 |  |  | 2020 |  |  | 2019 |
Expected dividend yield |  |  | 0 | % |  |  | 0 | % |  |  | 0 | %
Expected volatility |  |  | 53 | % |  |  | 53 | % |  |  | 53 | %
Risk-free interest rate |  |  | 0.84 | % |  |  | 0.53 | % |  |  | 2.40 | %
Expected term (in years) |  |  | 5.38 |  |  |  | 5.72 |  |  |  | 5.66 |
Schedule of Share-based Compensation, Stock Options, Activity | A summary of option activity under the Plan for the year ended December 31, 2021 was as follows:
|  | Shares (in 000’s) |  |  | Weighted- Average Exercise Price |  |  | Weighted- Average Remaining Contractual Term (years) |  |  | Aggregate Intrinsic Value (in 000’s) |
Outstanding at January 1, 2021 |  |  | 3,418 |  |  | $ | 19.80 |  |  |  |  |  |  |  |  |
Granted |  |  | 273 |  |  |  | 95.32 |  |  |  |  |  |  |  |  |
Exercised |  |  | (1,206 | ) |  |  | 16.12 |  |  |  |  |  |  |  |  |
Forfeited or expired |  |  | (50 | ) |  |  | 33.77 |  |  |  |  |  |  |  |  |
Outstanding at December 31, 2021 |  |  | 2,435 |  |  | $ | 29.81 |  |  |  | 6.34 |  |  | $ | 151,033 |
Exercisable at December 31, 2021 |  |  | 1,863 |  |  | $ | 20.54 |  |  |  | 5.75 |  |  | $ | 131,837 |
Share-based Compensation, Performance Shares Award Unvested Activity | A summary of unvested options activity under the Plan for the year ended December 31, 2021 was as follows:
|  | Shares (in 000’s) |  |  | Weighted-Average Grant-Date Fair Value |
Unvested at January 1, 2021 |  |  | 1,046 |  |  | $ | 15.09 |
Granted |  |  | 273 |  |  |  | 45.08 |
Forfeited or expired |  |  | (50 | ) |  |  | 7.89 |
Vested |  |  | (697 | ) |  |  | 15.74 |
Unvested at December 31, 2021 |  |  | 572 |  |  | $ | 28.63 |
Summary of Weighted Average Grant Date Fair Value of Options Granted and Total intrinsic Value of options Exercised | The weighted average grant date fair value of options granted and the total intrinsic value of options exercised were as follows:
|  | Years Ended |
|  | 2021 |  |  | 2020 |  |  | 2019 |
Weighted-average grant-date fair value |  | $ | 45.08 |  |  | $ | 13.85 |  |  | $ | 17.95 |
Intrinsic value of options (in thousands) |  | $ | 127,024 |  |  | $ | 59,771 |  |  | $ | 9,955 |
Schedule of Share-based Compensation, Restricted Stock, RSU and PSU Activity | A summary of restricted stock, RSU and PSU activity under the Plan for the year ended December 31, 2021 was as follows:
|  | Restricted Stock |  |  | Restricted Stock Units |  |  | Performance Stock Units |
|  | Units (in 000’s) |  |  | Weighted- Average Grant- Date Fair Value |  |  | Units (in 000’s) |  |  | Weighted- Average Grant- Date Fair Value |  |  | Units (in 000’s) |  |  | Weighted- Average Grant- Date Fair Value |
Outstanding at January 1, 2021 |  |  | 11 |  |  | $ | 59.06 |  |  |  | 122 |  |  | $ | 32.97 |  |  |  | 15 |  |  | $ | 51.42 |
Granted |  |  | 3 |  |  |  | 148.36 |  |  |  | 63 |  |  |  | 105.62 |  |  |  | — |  |  |  | — |
Vested |  |  | (11 | ) |  |  | 59.95 |  |  |  | (54 | ) |  |  | 35.34 |  |  |  | (5 | ) |  |  | 51.42 |
Outstanding at December 31, 2021 |  |  | 3 |  |  | $ | 154.96 |  |  |  | 131 |  |  | $ | 66.94 |  |  |  | 10 |  |  | $ | 51.42 |

X
- Definition Tabular disclosure of compensation cost that has been charged against income. + References No definition available. + Details
Name: | staa_ScheduleOfCompensationCostTableTextBlock
Namespace Prefix: | staa_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of share-based compensation of fair value of stock compensation granted during the period. + References No definition available. + Details
Name: | staa_ScheduleOfSharebasedCompensationFairValueOfStockCompensationGrantedTableTextBlock
Namespace Prefix: | staa_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Schedule of share based compensation restricted stock and restricted stock units activity and performance stock units. + References No definition available. + Details
Name: | staa_ScheduleOfSharebasedCompensationRestrictedStockAndRestrictedStockUnitsActivityAndPerformanceStockUnitsTableTextBlock
Namespace Prefix: | staa_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=122041274&loc=d3e301413-122809 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901 + Details
Name: | us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the total intrinsic value of options exercised (or share units converted), share-based liabilities paid, and the total fair value of shares vested during the year. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGrantDateIntrinsicValueTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of cost not yet recognized and weighted-average period over which cost is expected to be recognized for nonvested award under share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfUnrecognizedCompensationCostNonvestedAwardsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of number and weighted-average grant date fair value for nonvested performance shares. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationPerformanceSharesAwardUnvestedActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

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