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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 $)
3 Months Ended 9 Months Ended
Jun. 30, 2011
Dec. 31, 2010
Jun. 30, 2012
Lower Exercise Price Range   $ 3.125 $ 2.925
Weighted Average Share Price     $ 1.85
Upper Exercise Price Range $ 3.55 $ 3.55  
Exercise Price Range $2.925 To $5.25 [Member] | Directors Plans [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 292 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] | Directors Plans [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 292 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] | Directors Plans [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     5 years 109 days
Number of Stock Options Exercisable (in Shares)     8,000
Weighted Average Share Price     $ 10.75
Upper Exercise Price Range     $ 11.00
Total [Member] | Directors Plans [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