CONSOLIDATED BALANCE SHEETS [Parenthetical] - USD ($)	Dec. 31, 2018	Sep. 30, 2018
Allowance for doubtful accounts (in dollars)	$ 269,000	$ 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	18,198,121	18,152,074
Common stock, shares outstanding	17,387,961	17,341,914
Treasury stock, shares	810,160	810,160