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Note 6 - Capital Stock, Treasury Stock, Contributed Capital and Stock Options: (Detail) - Summary of the range of exercise prices for stock options outstanding and exercisable under the Director Plans: (USD $)
6 Months Ended
Mar. 31, 2013
Lower Exercise Price $ 2.925
Outstanding Stock Options (in Shares) 31,000,000,000
Weighted Average Share Price $ 5.57
Number of Stock Options Exercisable (in Shares) 25,000
Weighted Average Share Price $ 6.20
Exercise Price Range $2.925 To $5.25 [Member] | Directors Plans [Member]
 
Lower Exercise Price $ 2.925
Upper Exercise Price $ 5.25
Outstanding Stock Options (in Shares) 17,000,000,000
Weighted Average Share Price $ 3.34
Weighted Average Remaining Life 7 years 73 days
Number of Stock Options Exercisable (in Shares) 11,000
Weighted Average Share Price $ 3.56
Exercise Price Range $6.00 To $7.25 [Member] | Directors Plans [Member]
 
Lower Exercise Price $ 6.00
Upper Exercise Price $ 7.25
Outstanding Stock Options (in Shares) 8,000,000,000
Weighted Average Share Price $ 6.43
Weighted Average Remaining Life 4 years 109 days
Number of Stock Options Exercisable (in Shares) 8,000
Weighted Average Share Price $ 6.43
Exercise Price Range $10.50 To $11.00 [Member] | Directors Plans [Member]
 
Lower Exercise Price $ 10.50
Upper Exercise Price $ 11.00
Outstanding Stock Options (in Shares) 6,000,000,000
Weighted Average Share Price $ 10.75
Weighted Average Remaining Life 4 years 6 months
Number of Stock Options Exercisable (in Shares) 6,000
Weighted Average Share Price $ 10.75