Deferred Revenue (Tables)

6 Months Ended

Jun. 30, 2022

Deferred Revenue Disclosure [Abstract]

Summary of Changes in Deferred Revenue

The following table presents the changes in deferred revenue for the periods presented (in thousands):

	Six Months Ended June 30,
	2022			2021
Balance at beginning of period	$	794		$	7,088
Deferral of revenue		2,661			319
Recognition of deferred revenue		(459	)		(6,872	)
Balance at end of period	$	2,996		$	535