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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: (Directors Plans [Member], USD $)
3 Months Ended
Dec. 31, 2012
Exercise Price Range $2.925 To $5.25 [Member]
 
Lower Exercise Price Range $ 2.925
Number of Stock Options Exercisable (in Shares) 23,000
Weighted Average Share Price $ 3.43
Weighted Average Remaining Life 6 years 109 days
Number of Stock Options Exercisable (in Shares) 12,667
Weighted Average Share Price $ 3.84
Upper Exercise Price Range $ 5.25
Exercise Price Range $6.00 To $7.25 [Member]
 
Lower Exercise Price Range $ 6.00
Number of Stock Options Exercisable (in Shares) 11,000
Weighted Average Share Price $ 6.46
Weighted Average Remaining Life 4 years 109 days
Number of Stock Options Exercisable (in Shares) 9,333
Weighted Average Share Price $ 6.55
Upper Exercise Price Range $ 7.25
Exercise Price Range $10.50 To $11.00 [Member]
 
Lower Exercise Price Range $ 10.50
Number of Stock Options Exercisable (in Shares) 8,000
Weighted Average Share Price $ 10.75
Weighted Average Remaining Life 4 years 292 days
Number of Stock Options Exercisable (in Shares) 8,000
Weighted Average Share Price $ 10.75
Upper Exercise Price Range $ 11.00
Total [Member]
 
Number of Stock Options Exercisable (in Shares) 42,000
Weighted Average Share Price $ 5.62
Number of Stock Options Exercisable (in Shares) 30,000
Weighted Average Share Price $ 6.52