Quarterly report pursuant to Section 13 or 15(d)

Significant Accounting Policies - Additional Information (Details)

v3.20.2
Significant Accounting Policies - Additional Information (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Dec. 31, 2019
Deferred revenue         $ 3.3
Deferred revenue, recognized $ 0.4 $ 0.4 $ 1.7 $ 1.6  
Remaining service period to recognize deferred revenue, description     2024    
Capitalized contract cost, net 0.2   $ 0.2   $ 0.4
Laser revenue $ 0.1 $ 0.2 $ 0.4 $ 0.5  
Minimum [Member]          
Regular warranty service contracts term     12 months    
Maximum [Member]          
Extended warranty service contracts term     60 months    
Capitalized contract cost amortization period     1 year