XML 48 R37.htm IDEA: XBRL DOCUMENT v3.8.0.1
Note 7 - Accrued Liabilities - Changes in Warranty Reserve (Details) - USD ($)
3 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Beginning balance $ 179,101 $ 356,984
Warranty provision 12,361 9,696
Warranty settlements (3,154) (12,742)
Ending balance $ 188,308 $ 353,938