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Stock-Based Compensation - Shares of Restricted Stock Granted under 2010 Plan (Details) - Restricted Stock - shares	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
2010 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares	75,624
Remaining Term	1 year 9 months 18 days
2010 Plan | 2015 | Five Years
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Term					5 years
Shares	527
Remaining Term					1 month 6 days
2010 Plan | 2016 | Five Years
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Term				5 years
Shares	10,874
Remaining Term				7 months 6 days
2010 Plan | 2017 | Five Years
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Term			5 years
Shares	7,017
Remaining Term			1 year 7 months 6 days
2010 Plan | 2018 | Five Years
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Term		5 years
Shares	6,184
Remaining Term		2 years 6 months
2010 Plan | 2018 | Three Years
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Term		3 years
Shares	5,371
Remaining Term		7 months 6 days
2010 Plan | 2018 | Four Years
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Term		4 years
Shares	2,068
Remaining Term		1 year 6 months
2010 Plan | 2019 | Three Years
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Term	3 years
Shares	16,254
Remaining Term	1 year 7 months 6 days
2010 Plan | 2019 | Two Years
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Term	2 years
Shares	1,484
Remaining Term	7 months 6 days
2020 Plan | 2020 | Three Years
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Term	3 years
Shares	20,842
Remaining Term	2 years 7 months 6 days
2020 Plan | 2020 | Two Years
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Term	2 years
Shares	694
Remaining Term	1 year 7 months 6 days
2020 Plan | 2020 | One Year
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Term	1 year
Shares	4,309
Remaining Term	9 months 18 days

X

- Definition

Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents 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 (i)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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

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- Definition

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
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-Section 50
-Paragraph 2
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-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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