Summary of Significant Accounting Policies - Principles of Consolidation (Details) - Quantum Capital Management - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2020	Oct. 14, 2020
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Aggregate consideration		$ 250
Gain on sale	$ 189

Amount after tax of gain (loss) not previously recognized resulting from the disposal of a discontinued operation.

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