Note 3 - Cash, Cash Equivalents and Investments (Tables)

6 Months Ended

Mar. 31, 2018

Notes Tables

Investments Classified by Contractual Maturity Date [Table Text Block]

	March 31, 2018		September 30, 2017
Less than one year	$	6,285,225	$	5,937,150
1-5 years		20,180,000		19,816,000
Total	$	26,465,225	$	25,753,150