XML 52 R37.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Stockholders' Equity (Tables) | 12 Months Ended
--- | ---
Dec. 28, 2018
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 2018 (in thousands):
|  | Fair Value |
Stock options |  | $ | 9,702 |
Restricted stock units |  |  | 849 |
Restricted stock |  |  | 335 |
Total stock-based compensation expense |  | $ | 10,886 |
Schedule of Compensation Cost | The cost that has been charged against income for stock-based compensation is set forth below (in thousands):
|  | Years Ended |
|  | 2018 |  |  | 2017 |  |  | 2016 |
Employee stock option |  | $ | 4,013 |  |  | $ | 1,731 |  |  | $ | 5,485 |
Restricted stock |  |  | 274 |  |  |  | 186 |  |  |  | 298 |
Restricted stock units |  |  | 2,120 |  |  |  | 1,226 |  |  |  | 2,717 |
Nonemployee stock options |  |  | 355 |  |  |  | 18 |  |  |  | 58 |
Total stock-based compensation expense |  | $ | 6,762 |  |  | $ | 3,161 |  |  | $ | 8,558 |
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 |
|  | 2018 |  |  | 2017 |  |  | 2016 |
Cost of sales |  | $ | 15 |  |  | $ | 8 |  |  | $ | 612 |
General and administrative |  |  | 2,635 |  |  |  | 1,487 |  |  |  | 3,809 |
Marketing and selling |  |  | 1,805 |  |  |  | 805 |  |  |  | 1,961 |
Research and development |  |  | 2,307 |  |  |  | 861 |  |  |  | 2,176 |
Total stock-based compensation expense, net |  |  | 6,762 |  |  |  | 3,161 |  |  |  | 8,558 |
Amounts capitalized as part of inventory |  |  | 637 |  |  |  | 372 |  |  |  | 269 |
Total stock-based compensation expense, gross |  | $ | 7,399 |  |  | $ | 3,533 |  |  | $ | 8,827 |
Schedule of Unrecognized Compensation Cost, Non-Vested Stock-Based Compensation Arrangements | As of December 28, 2018, total unrecognized compensation cost related to non-vested stock-based compensation arrangements granted under the Plan were as follows (in thousands):
|  | 2018 |
Stock options |  | $ | 9,767 |
Restricted stock and restricted stock units |  |  | 2,007 |
Total unrecognized stock-based compensation cost |  | $ | 11,774 |
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 |
|  | 2018 |  |  | 2017 |  |  | 2016 |
Expected dividend yield |  |  | 0 | % |  |  | 0 | % |  |  | 0 | %
Expected volatility |  |  | 53 | % |  |  | 57 | % |  |  | 57 | %
Risk-free interest rate |  |  | 2.71 | % |  |  | 1.96 | % |  |  | 1.34 | %
Expected term (in years) |  |  | 5.72 |  |  |  | 5.67 |  |  |  | 5.57 |
Schedule of Share-based Compensation, Stock Options, Activity | A summary of option activity under the Plan for the year ended December 28, 2018 is presented below:
|  | Shares (in 000’s) |  |  | Weighted- Average Exercise Price |  |  | Weighted- Average Remaining Contractual Term (years) |  |  | Aggregate Intrinsic Value (in 000’s) |
Outstanding at December 29, 2017 |  |  | 3,725 |  |  | $ | 8.78 |  |  |  |  |  |  |  |  |
Granted |  |  | 826 |  |  |  | 23.19 |  |  |  |  |  |  |  |  |
Exercised |  |  | (596 | ) |  |  | 8.72 |  |  |  |  |  |  |  |  |
Forfeited or expired |  |  | (35 | ) |  |  | 11.27 |  |  |  |  |  |  |  |  |
Outstanding at December 28, 2018 |  |  | 3,920 |  |  | $ | 11.80 |  |  |  | 6.80 |  |  | $ | 76,615 |
Exercisable at December 28, 2018 |  |  | 2,660 |  |  | $ | 8.53 |  |  |  | 5.79 |  |  | $ | 60,455 |
Share-based Compensation, Performance Shares Award Unvested Activity | A summary of unvested options activity under the Plan for the year ended December 28, 2018 was as follows:
|  | Shares (in 000’s) |  |  | Weighted- Average Grant-Date Fair Value |
Unvested at December 29, 2017 |  |  | 1,148 |  |  | $ | 4.96 |
Granted |  |  | 826 |  |  |  | 11.95 |
Forfeited or expired |  |  | (35 | ) |  |  | 5.73 |
Vested |  |  | (679 | ) |  |  | 4.90 |
Unvested at December 28, 2018 |  |  | 1,260 |  |  | $ | 9.67 |
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 |
|  | 2018 |  |  | 2017 |  |  | 2016 |
Weighted-average grant-date fair value |  | $ | 11.95 |  |  | $ | 5.42 |  |  | $ | 3.77 |
Intrinsic value of options (in thousands) |  | $ | 13,699 |  |  | $ | 3,065 |  |  | $ | 1,737 |
Restricted Stock |
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity | A summary of restricted stock activity under the Plan for the year ended December 28, 2018 was as follows:
|  | Shares (in 000’s) |  |  | Weighted- Average Grant- Date Fair Value |
Outstanding at December 29, 2017 |  |  | 21 |  |  | $ | 9.60 |
Granted |  |  | 11 |  |  |  | 29.43 |
Vested |  |  | (21 | ) |  |  | 9.70 |
Outstanding at December 28, 2018 |  |  | 11 |  |  | $ | 29.80 |
Restricted Stock Units (RSUs) |
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity | A summary of restricted stock units’ activity under the Plan for the year ended December 28, 2018 was as follows:
|  | Units (in 000’s) |  |  | Weighted- Average Grant- Date Fair Value |
Outstanding at December 29, 2017 |  |  | 488 |  |  | $ | 9.45 |
Granted |  |  | 49 |  |  |  | 17.22 |
Vested |  |  | (206 | ) |  |  | 9.65 |
Forfeited or expired |  |  | (9 | ) |  |  | 11.05 |
Outstanding at December 28, 2018 |  |  | 322 |  |  | $ | 10.46 |

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: | nonnum: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: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the allocation of equity-based compensation costs to a given line item on the balance sheet and income statement for the period. This may include the reporting line for the costs and the amount capitalized and expensed. + 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=109197908&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=115993241&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=109197908&loc=d3e5047-113901 + Details
Name: | us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum: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=109197908&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGrantDateIntrinsicValueTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum: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=109197908&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=109197908&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=109197908&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum: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=109197908&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
Name: | us-gaap_ScheduleOfSharebasedCompensationRestrictedStockAndRestrictedStockUnitsActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the total compensation cost related to nonvested awards not yet recognized and the weighted-average period over which it is expected to be recognized. + 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=109197908&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfUnrecognizedCompensationCostNonvestedAwardsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum: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=109197908&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationPerformanceSharesAwardUnvestedActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_AwardTypeAxis=us-gaap_RestrictedStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=us-gaap_RestrictedStockUnitsRSUMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |