Stock-based Compensation (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019	Jul. 31, 2015
Share-based Payment Arrangement [Abstract]
Shares authorized (in shares)	500,000		7,150,000
Shares issued (in shares)	168,673
Stock-based compensation expense	$ 0.8	$ 0.6
Share-based compensation, nonvested awards, compensation cost not yet recognized	$ 2.7
Period for recognition of compensation on unvested stock option	1 year 7 months 6 days

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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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.

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Number of shares authorized for issuance under share-based payment arrangement.

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Number of shares issued under share-based payment arrangement.

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