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Equity Awards and Instruments - Acquisition Options Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands			1 Months Ended	3 Months Ended		9 Months Ended
	Aug. 28, 2020	Mar. 31, 2018	Mar. 31, 2020	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options exercise price, lower limit (USD per share)	$ 0.01
Share-based compensation expense				$ 20,405	$ 2,021	$ 23,617	$ 6,046
Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options exercise price, lower limit (USD per share)						$ 0.01
Share-based compensation expense				$ 2,893	$ 1,575	$ 5,849	$ 4,795
Stock Option | Equity Incentive Plan | Class B Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized (in shares)		900,000
Award vesting period		5 years
Stock options exercise price, upper limit (USD per share)		$ 6.805
Award service period			4 years
Stock options exercise price, lower limit (USD per share)		0.01
Grant date fair value (USD per share)		$ 3.44
Accelerated share-based compensation cost						1,548
Share-based compensation expense						$ 2,012
Shares outstanding (in shares)				900,000		900,000		900,000
Shares outstanding, intrinsic value				$ 7,992		$ 7,992

X

- Definition

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

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Amount of additional cost recognized for award under share-based payment arrangement from occurrence of event accelerating recognition of cost.

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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.

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

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