XML 69 R56.htm IDEA: XBRL DOCUMENT v3.21.1

Shareholders' Equity (Stock Options Granted in 2017 and 202020) (Narrative) (Details) - $ / shares			1 Months Ended			12 Months Ended
	Jun. 08, 2020	Jun. 08, 2016	Jan. 31, 2019	Apr. 30, 2018	Jan. 30, 2017	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise price of options						$ 32.54	$ 33.83	$ 36.11
Share Option Plan 2013 [Member] | 28.38 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted		93,660
Exercise price of options		$ 28.38
Expiration date		Jun. 08, 2024
Closing price to determine expiration date		$ 14.19
Share Option Plan 2013 [Member] | 39.62 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted					119,925
Exercise price of options					$ 39.62
Expiration date					Jan. 30, 2025
Closing price to determine expiration date					$ 19.81
Share Option Plan 2013 [Member] | 36.11 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted				137,010
Exercise price of options				$ 36.11
Expiration date				Apr. 30, 2026
Closing price to determine expiration date				$ 18.06
Share Option Plan 2013 [Member] | 33.83 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted			141,928
Exercise price of options			$ 33.83
Expiration date			Jan. 31, 2027
Closing price to determine expiration date			$ 16.92
Share Option Plan 2013 [Member] | $32.54 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted	148,426
Exercise price of options	$ 32.54
Expiration date	Jun. 08, 2028
Closing price to determine expiration date	$ 16.27

X

- Definition

Condition for Expiration

+ References

No definition available.

+ Details

Name:	silc_ConditionForExpiration
Namespace Prefix:	silc_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Date the equity-based award expires, in CCYY-MM-DD format.

+ 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)(2)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardExpirationDate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
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

Net number of share options (or share units) granted during the period.

+ 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)(iv)(1)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

+ References

No definition available.

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_PlanNameAxis=silc_ShareOptionPlan2013Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=silc_Allocation6Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=silc_Allocation8Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=silc_Allocation9Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=silc_Allocation10Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=silc_Allocation4OneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: