Quarterly report pursuant to Section 13 or 15(d)

Revenue - Narrative (Details)

v3.21.2
Revenue - Narrative (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2021
Dec. 31, 2020
Revenue from Contract with Customer [Abstract]      
Contract assets $ 0 $ 0 $ 0
Revenue recognized which was included in the deferred revenue balance at the beginning of the period $ 100,000 $ 1,100,000