XML 59 R45.htm IDEA: XBRL DOCUMENT
v3.22.0.1

Stock-Based Compensation - Plan details (Details) |  |  | 12 Months Ended | 96 Months Ended |
--- | --- | --- | --- | --- | ---
Jan. 01, 2021 shares | Jan. 01, 2014 shares | Dec. 31, 2021 item $ / shares shares | Dec. 31, 2020 $ / shares shares | Dec. 31, 2019 $ / shares shares | Dec. 31, 2018 shares | Dec. 31, 2017 shares | Dec. 31, 2016 shares | Dec. 31, 2015 shares | Dec. 31, 2021 item $ / shares shares | Nov. 30, 2013 shares
Stock options |  |  |  |  |  |  |  |  |  |  |
Stock-based compensation |  |  |  |  |  |  |  |  |  |  |
Total number of shares of common stock available for issuance |  |  | 3,597,371 | 3,346,092 | 3,975,160 |  |  |  |  | 3,597,371 |
Options granted (in shares) |  |  | 1,827,234 | 1,679,324 |  |  |  |  |  |  |
Information with respect to stock options outstanding |  |  |  |  |  |  |  |  |  |  |
Exercisable options (in shares) |  |  | 5,576,430 | 4,668,179 | 3,950,965 |  |  |  |  | 5,576,430 |
Weighted-average exercise price per share of exercisable options (in dollars per share) | $ / shares |  |  | $ 24.15 | $ 21.75 | $ 17.79 |  |  |  |  | $ 24.15 |
Weighted average grant date fair value per share of options granted during the year (in dollars per share) | $ / shares |  |  | $ 21.65 | $ 16.96 | $ 20.74 |  |  |  |  |  |
Weighted-average remaining contractual life |  |  | 6 years 7 months 24 days | 7 years | 7 years 3 months 25 days |  |  |  |  |  |
Employee stock purchase plan |  |  |  |  |  |  |  |  |  |  |
Stock-based compensation |  |  |  |  |  |  |  |  |  |  |
Total number of shares of common stock available for issuance |  |  |  |  |  |  |  |  |  |  | 581,286
Initial term of plan |  |  | 2 years |  |  |  |  |  |  |  |
Second term of plan |  |  | 2 years |  |  |  |  |  |  |  |
Number of six month purchase periods | item |  |  | 4 |  |  |  |  |  |  | 4 |
Purchase period |  |  | 6 months |  |  |  |  |  |  |  |
Increase in shares of common stock available for issuance (in shares) |  | 313,545 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |  |
Awards issued under the plan (in shares) |  |  |  |  |  |  |  |  |  | 529,852 |
Employee stock purchase plan | Minimum |  |  |  |  |  |  |  |  |  |  |
Stock-based compensation |  |  |  |  |  |  |  |  |  |  |
Percentage of compensation that employees may withhold to purchase stock at a discount |  |  | 1.00% |  |  |  |  |  |  | 1.00% |
Employee stock purchase plan | Maximum |  |  |  |  |  |  |  |  |  |  |
Stock-based compensation |  |  |  |  |  |  |  |  |  |  |
Percentage of compensation that employees may withhold to purchase stock at a discount |  |  | 15.00% |  |  |  |  |  |  | 15.00% |
Purchase price as percentage of stock price at the initial offering date |  |  | 85.00% |  |  |  |  |  |  |  |
Purchase price as percentage of stock price at the purchase date |  |  | 85.00% |  |  |  |  |  |  |  |
Annual percentage increase in shares of common stock available for issuance |  |  | 1.00% |  |  |  |  |  |  |  |
Annual increase in shares of common stock available for issuance (in shares) |  |  | 621,814 |  |  |  |  |  |  |  |
Restricted stock units |  |  |  |  |  |  |  |  |  |  |
Stock-based compensation |  |  |  |  |  |  |  |  |  |  |
Restricted stock granted (in shares) |  |  | 670,700 | 348,288 |  |  |  |  |  |  |
The 2010 Plan |  |  |  |  |  |  |  |  |  |  |
Stock-based compensation |  |  |  |  |  |  |  |  |  |  |
Total number of shares of common stock available for issuance |  |  | 0 |  |  |  |  |  |  | 0 |
The 2013 Plan |  |  |  |  |  |  |  |  |  |  |
Stock-based compensation |  |  |  |  |  |  |  |  |  |  |
Total number of shares of common stock available for issuance |  |  | 13,122,238 |  |  |  |  |  |  | 13,122,238 |
Annual percentage increase in shares of common stock available for issuance |  |  | 4.00% |  |  |  |  |  |  |  |
Increase in shares of common stock available for issuance (in shares) | 2,314,937 |  |  |  |  |  |  |  |  |  |
Awards issued under the plan (in shares) |  |  |  |  |  |  |  |  |  | 12,400,073 |
The 2013 Plan | Restricted stock units |  |  |  |  |  |  |  |  |  |  |
Stock-based compensation |  |  |  |  |  |  |  |  |  |  |
Restricted stock granted (in shares) |  |  |  |  |  |  |  |  |  | 1,124,487 |
The 2013 Plan | Restricted stock units | Minimum |  |  |  |  |  |  |  |  |  |  |
Stock-based compensation |  |  |  |  |  |  |  |  |  |  |
Vesting period |  |  | 2 years |  |  |  |  |  |  |  |
The 2013 Plan | Restricted stock units | Maximum |  |  |  |  |  |  |  |  |  |  |
Stock-based compensation |  |  |  |  |  |  |  |  |  |  |
Vesting period |  |  | 3 years |  |  |  |  |  |  |  |

X
- Definition Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition. + 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 (a)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + 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)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition Number of additional shares authorized for issuance under share-based payment arrangement. + References No definition available. + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of shares authorized for issuance 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 (a)(3) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

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

X
- Definition The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. + 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)(1)(iii) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan. + 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)(1)(iii) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Gross number of share options (or share units) granted during the period. + References No definition available. + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. + 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)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of shares issued 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 -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + 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 (e)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
Name: | us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Purchase price of common stock expressed as a percentage of its fair value. + References No definition available. + Details
Name: | us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the annual increase in maximum number of shares (or other type of equity) approved (usually by shareholders and board of directors), for awards under the equity-based compensation plan. + References No definition available. + Details
Name: | xncr_ShareBasedCompensationArrangementByShareBasedPaymentAwardAnnualIncreaseInSharesAuthorized
Namespace Prefix: | xncr_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the annual percentage increase in maximum number of shares (or other type of equity) approved (usually by shareholders and board of directors), for awards under the equity-based compensation plan. + References No definition available. + Details
Name: | xncr_ShareBasedCompensationArrangementByShareBasedPaymentAwardAnnualPercentageIncreaseInSharesAuthorized
Namespace Prefix: | xncr_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The initial period of time from the date the plan becomes effective until it expires. + References No definition available. + Details
Name: | xncr_ShareBasedCompensationArrangementByShareBasedPaymentAwardInitialTermOfPlan
Namespace Prefix: | xncr_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The percentage of annual compensation that employees may elect to have withheld to purchase stock at a discount. + References No definition available. + Details
Name: | xncr_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOfCompensationWithheldToPurchaseSharesAtDiscount
Namespace Prefix: | xncr_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the purchase price expressed as a percentage of the fair market value of common stock at the initial offering date. + References No definition available. + Details
Name: | xncr_ShareBasedCompensationArrangementByShareBasedPaymentAwardPurchasePriceOfCommonStockPercentageOnInitialOfferingDate
Namespace Prefix: | xncr_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The subsequent two year period of the ESPP upon the ending of the initial two year term. + References No definition available. + Details
Name: | xncr_ShareBasedCompensationArrangementByShareBasedPaymentAwardSubsequentTermOfPlan
Namespace Prefix: | xncr_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the number of six month purchase periods included in the initial term of the plan. + References No definition available. + Details
Name: | xncr_SharebasedCompensationArrangementBySharebasedPaymentAwardNumberOfPurchasePeriods
Namespace Prefix: | xncr_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the purchase period during which the employee withholding amounts may be used to purchase shares. + References No definition available. + Details
Name: | xncr_SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePeriod
Namespace Prefix: | xncr_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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

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

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
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: |

X
- Details
Name: | us-gaap_PlanNameAxis=xncr_EquityIncentivePlan2010Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PlanNameAxis=xncr_EquityIncentivePlan2013Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |