XML 43 R29.htm IDEA: XBRL DOCUMENT v3.20.4
13. Commitments and Contingencies (Tables)
12 Months Ended
Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract]  
Schedule for product warranties
    Balance at Beginning of Year     Warranties Issued     Warranties Settled     Balance at End of Year  
2020   $ 1,248     $ 166     $ (623 )   $ 791  
2019   $ 1,546     $ 606     $ (904 )   $ 1,248