XML 51 R33.htm IDEA: XBRL DOCUMENT v3.21.1
Commitments and Contingencies (Tables)
 12 Months Ended
Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract]  
Schedule of Product Warranty Liability [Table Text Block] Changes in the liability for product warranty and deferred revenue associated with extended warranties and service contracts were as follows (in thousands):
 Product
Warranty		Deferred
Revenue
Liability at January 1, 2019$22 $1,471 
Settlements made during the period— (1,087)
Change in liability for warranties issued during the period— 725 
Change in liability for pre-existing warranties(22)— 
Liability at December 31, 2019— 1,109 
Settlements made during the period— (817)
Change in liability for warranties issued during the period— 447 
Change in liability for pre-existing warranties— — 
Liability at December 31, 2020$— $739 
Current liability$— $438 
Non-current liability— 301 
Liability at December 31, 2020$— $739