Quarterly report pursuant to Section 13 or 15(d)

Revenue Recognition - Additional Information (Detail)

v3.20.2
Revenue Recognition - Additional Information (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Mar. 31, 2020
Dec. 31, 2019
Disaggregation Of Revenue [Line Items]            
Revenue from products and services transferred to customers, percentage 66.00% 81.00% 71.00% 82.00%    
Revenue from services transferred to customers over time, percentage 34.00% 19.00% 29.00% 18.00%    
Undelivered elements (product training, installation, product and support services) $ 521   $ 521     $ 559
Allowance for accounts receivable $ 3,581   3,581     $ 2,531
Revenue recognized from contract liability     400 $ 300    
Extended warranties recognized     $ 2,000 $ 400    
CARE            
Disaggregation Of Revenue [Line Items]            
Allowance for accounts receivable         $ 1,000