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Revenue
 6 Months Ended
Jun. 30, 2022
Revenue from Contract with Customer [Abstract]  
Revenue Revenue
The following table presents revenue disaggregated by type and geography (in thousands):
Three Months Ended June 30,Six Months Ended June 30,
2022202120222021
U.S.
System sales and rentals$8,516 $4,770 $16,270 $9,330 
Handpieces and other consumables5,723 1,653 10,167 3,274 
Service567 137 929 209 
Total U.S. revenue14,806 6,560 27,366 12,813 
Outside of U.S.
System sales and rentals869 973 1,610 1,244 
Handpieces and other consumables832 890 1,578 1,493 
Service184 53 334 118 
Total outside of U.S. revenue1,885 1,916 3,522 2,855 
Total revenue$16,691 $8,476 $30,888 $15,668