CONSOLIDATED BALANCE SHEETS [Parenthetical] - USD ($)	Dec. 31, 2016	Sep. 30, 2016
Allowance for doubtful accounts (in dollars)	$ 175,000	$ 171,000
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	17,720,215	17,677,284
Common stock, shares outstanding	16,910,055	16,867,124
Treasury stock, shares	810,160	810,160