Note 4 - Stock Based Compensation (Detail) - Stock Option Activity (USD $)	6 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Outstanding at September 30, 2012	1,029,176
Outstanding at September 30, 2012 (in Dollars per share)	$ 3.07
Exercised	(32,887)	59,190
Exercised (in Dollars per share)	$ 1.55
Cancelled or Forfeited	(6,000)
Cancelled or Forfeited (in Dollars per share)	$ 5.41
Outstanding at March 31, 2013	990,289
Outstanding at March 31, 2013 (in Dollars per share)	$ 3.10