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Revenue and Deferred Revenue (Tables)
 6 Months Ended
Jun. 30, 2022
Revenue Recognition and Deferred Revenue [Abstract]  
Deferred Revenue Activity
Deferred revenue activity for the period ended June 30, 2022 and December 31, 2021 are as follows (in thousands):
June 30,December 31,
20222021
Balance, beginning of period$376 $250 
Additions315 376 
Revenue recognized(262)(250)
Balance, end of period$429 $376