CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)	Sep. 30, 2019	Sep. 30, 2018
CONSOLIDATED BALANCE SHEETS
Allowance for doubtful accounts (in dollars)	$ 276,000	$ 262,000
Common stock, par value (in dollars per share)	$ 0.0005	$ 0.0005
Common stock, shares authorized	40,000,000	40,000,000
Common stock, shares issued	18,438,333	18,152,074
Common stock, shares outstanding	14,802,905	17,341,914
Treasury stock, shares	3,635,428	810,160