Quarterly report pursuant to Section 13 or 15(d)

Revenue Recognition - Additional Information (Detail)

v3.21.2
Revenue Recognition - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
Revenue Recognition [Abstract]          
Revenue recognized from contract liability     $ 200 $ 300  
Contract With Customer Liability Revenue Recognized Extended Warranty     1,100 $ 2,000  
Undelivered elements (product training, installation, product and support services) $ 1,015   $ 1,015   $ 670
Revenue from services transferred to customers over time, percentage 12.00% 14.00% 12.00% 22.00%  
Revenue from products and services transferred to customers, percentage 88.00% 86.00% 88.00% 78.00%