Note 6 - Capital Stock, Treasury Stock, Contributed Capital and Stock Options (Details) - Summary of the Range of Exercise Prices for Stock Options Outstanding and Exercisable Under the Director Plans (USD $)	6 Months Ended
	Mar. 31, 2014
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Outstanding Stock Options (in Shares)	29,000
Weighted Average Share Price	$ 5.45
Number of Stock Options Exercisable (in Shares)	26,667
Weighted Average Share Price	$ 5.67
Directors Plans [Member] | Exercise Price Range $2.925 To $5.25 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Lower Exercise Price	$ 2.925
Upper Exercise Price	$ 5.25
Outstanding Stock Options (in Shares)	17,000
Weighted Average Share Price	$ 3.34
Weighted Average Remaining Life	6 years 73 days
Number of Stock Options Exercisable (in Shares)	14,667
Weighted Average Share Price	$ 3.40
Directors Plans [Member] | Exercise Price Range $6.00 To $7.25 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Lower Exercise Price	$ 6.00
Upper Exercise Price	$ 7.25
Outstanding Stock Options (in Shares)	6,000
Weighted Average Share Price	$ 6.15
Weighted Average Remaining Life	4 years 109 days
Number of Stock Options Exercisable (in Shares)	6,000
Weighted Average Share Price	$ 6.15
Directors Plans [Member] | Exercise Price Range $10.50 To $11.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Lower Exercise Price	$ 10.50
Upper Exercise Price	$ 11.00
Outstanding Stock Options (in Shares)	6,000
Weighted Average Share Price	$ 10.75
Weighted Average Remaining Life	3 years 6 months
Number of Stock Options Exercisable (in Shares)	6,000
Weighted Average Share Price	$ 10.75