Fair Value Measurements - Fair value of Liabilities Measured on a Recurring Basis (Details) - Contingent consideration - Stock appreciation rights - Recurring - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Level 1
Financial instruments measured at fair value on a recurring basis
Fair value of the liability	$ 0	$ 0
Level 2
Financial instruments measured at fair value on a recurring basis
Fair value of the liability	0	0
Level 3
Financial instruments measured at fair value on a recurring basis
Fair value of the liability	$ 241	$ 282