Consolidated Condensed Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($)	Mar. 31, 2020	Sep. 30, 2019
Inventories, allowance for excess and obsolete inventory	$ 3,400,000	$ 1,275,000
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	300,000,000	300,000,000
Common stock, shares issued (in shares)	10,971,950	10,861,950
Common stock, shares outstanding (in shares)	10,471,292	10,361,292
Treasury stock, shares (in shares)	500,658	500,658