XML 59 R49.htm IDEA: XBRL DOCUMENT v3.22.2.2
Note 8 - Agreements and Commitments (Details Textual) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2022
Minimum [Member]    
Standard Product Warranty, Term (Year)   1 year
Maximum [Member]    
Standard Product Warranty, Term (Year)   3 years
Extended Product Warranty, Term (Year)   4 years
Arbitration Regarding Marine Waste-Water Treatment System Warranty [Member]    
Loss Contingency, Damages Sought, Value $ 1.5