XML 31 R21.htm IDEA: XBRL DOCUMENT v3.21.2
Note 8 - Commitments and Contingencies (Tables)
9 Months Ended
Sep. 30, 2021
Notes Tables  
Schedule of Product Warranty Liability [Table Text Block]
  

Nine-month period ended September 30,

 
  

2021

  

2020

 

Accrued warranty obligations – beginning

 $149  $195 

Accruals for warranties issued

  123   75 

Settlements made

  (143)  (103)

Accrued warranty obligations – ending

 $129  $167