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Note 2 - Summary of Significant Accounting Policies (Tables)
12 Months Ended
Jun. 30, 2022
Notes Tables  
Schedule of Product Warranty Liability [Table Text Block]

(In thousands)

 

Warranty Provision

 

Balance as of June 30, 2020

 $18 

Warranty claims provided for

  49 

Settlements made

  (51)

Balance as of June 30, 2021

  16 

Warranty claims provided for

  112 

Settlements made

  (78)

Balance as of June 30, 2022

 $50