Receivables - Rollforward of Allowance for Doubtful Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Allowance for Doubtful Accounts [Roll Forward]
Balance as of beginning of period	$ 487	$ 1,514
Current period provision (benefit)	(75)	66
Direct write-offs charged against the allowance	(412)	(1,093)
Balance as of end of period	$ 0	$ 487