XML 36 R26.htm IDEA: XBRL DOCUMENT v3.23.3
Note 7 - Agreements and Commitments (Tables)
9 Months Ended
Sep. 30, 2023
Notes Tables  
Schedule of Product Warranty Liability [Table Text Block]
  

September 30,

2023

  

December 31,

2022

 

Balance at January 1

 $898,072  $962,313 

Warranty costs charged to cost of goods sold

  91,609   86,256 

Utilization charges against reserve

  (296,522

)

  (93,653

)

Foreign currency effect

  (3,810

)

  (56,844

)

Balance at the end of the period

 $689,349  $898,072