Note 1 - Summary of Significant Accounting Policies (Tables)

9 Months Ended

Jun. 30, 2018

Notes Tables

Fair Value, Assets Measured on Recurring Basis [Table Text Block]

	Total		Quoted Prices in Active Markets for Identical Assets (Level 1)
June 30, 2018
Mutual funds:
Money market funds	$	1,015,102	$	1,015,102
Total mutual funds		1,015,102		1,015,102
Total assets	$	1,015,102	$	1,015,102
September 30, 2017
Mutual funds:
Money market funds	$	851,195	$	851,195
Total mutual funds		851,195		851,195
Total assets	$	851,195	$	851,195

Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block]

	June 30, 2018				July 1, 2017
	3 months		9 months		3 months		9 months
Selling, general and administrative expenses	$	7,596	$	17,352	$	3,896	$	9,998
Product development expenses		356		1,064		272		811
Total share-based compensation expense before taxes	$	7,952	$	18,416	$	4,168	$	10,809

Share-based Compensation, Stock Options, Activity [Table Text Block]

	Options Outstanding
	Number of Shares									Weighted Average		Weighted Average
	Unvested			Vested			Total			Exercise Price		Contractual Life
Outstanding, September 30, 2017		34,700			212,081			246,781		$	8.36	3.95 years
Grants		-			-			-
Vested		-			-			-
Exercises		-			-			-
Cancellations/forfeitures		-			-			-
Outstanding, December 30, 2017		34,700			212,081			246,781		$	8.35	3.72 years
Grants		14,000			-			14,000			7.25
Vested		(5,600	)		5,600			-			2.70
Exercises		-			(24,100	)		(24,100	)		6.12
Cancellations/forfeitures		-			(7,844	)		(7,844	)		9.68
Outstanding, March 31, 2018		43,100			185,737			228,837		$	8.48	4.17 years
Grants		-			-			-
Vested		(3,100	)		3,100			-			4.25
Exercises		-			-			-
Cancellations/forfeitures		-			-			-
Outstanding, June 30, 2018		40,000			188,837			228,837		$	8.48	3.92 years

Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding and Exercisable [Table Text Block]

Range of Exercise Prices				Number of Shares		Weighted-Average Remaining Contractual Life (years)		Weighted Average Exercise Price		Exercisable Number of Shares		Exercisable Weighted- Average Exercise Price
	$2.01	-	$3.00		27,300		8.13	$	2.70		7,700	$	2.75
	$4.01	-	$5.00		36,100		4.05		4.53		30,000		4.62
	$5.01	-	$10.00		51,000		5.31		7.80		36,700		8.02
	$10.01	-	$15.00		114,437		2.26		11.40		114,437		11.40
					228,837		3.92		8.48		188,837		9.31