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Note 13 - Stockholders's Equity: (Detail) - Unaudited table summarizes stockholders’ equity transactions: (USD $)
 0 Months Ended 3 Months Ended 9 Months Ended
Dec. 15, 2011
Sep. 30, 2012
Mar. 31, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Sep. 29, 2012
Jan. 23, 2012
Dec. 30, 2011
Balance (in Shares)   44,249,184     44,249,184   44,249,184 46,047,053 53,497,584
Balance   $ 10,005,229     $ 10,005,229   $ 10,005,229   $ 11,358,959
Balance   33,887,740     33,887,740   33,887,740   40,994,013
Balance   (17,939,368)     (17,939,368)   (17,939,368)   (21,933,985)
Balance   25,953,601     25,953,601   25,953,601   30,418,987
Balance (in Shares)   45,484,997         44,249,184 46,047,053 53,497,584
Balance   10,233,628 11,358,959   11,358,959   10,005,229   11,358,959
Balance   35,109,427 40,994,013   40,994,013   33,887,740   40,994,013
Balance   (19,574,368) (21,933,985)   (21,933,985)   (17,939,368)   (21,933,985)
Balance   25,768,687 30,418,987   30,418,987   25,953,601   30,418,987
Exercise of stock options (in Shares)   20,187   22,583 693,340 29,833      
Exercise of stock options   22,781     634,558        
Exercise of stock options   (8,595)     (270,660)        
Exercise of stock options   14,186     363,898        
Repurchase and cancellaion of shares (in Shares)   1,255,900 7,570,236 0 2,371,204 0      
Repurchase and cancellaion of shares (5,829,082)   (5,829,082)            
Cancellation of restricted stock (in Shares)   (100)     (300)        
Stock-based compensation   166,371     291,932        
Stock-based compensation   166,371     291,932        
Net income for the period   1,635,000   (1,178,260) 3,994,617 115,345      
Net income for the period   1,635,000   (1,178,260) 3,994,617 115,345      
Normal Course Issuer Bid Member
                  
Repurchase and cancellaion of shares (in Shares)   (1,255,900)     (2,371,204)        
Repurchase and cancellaion of shares   (251,180)     (474,241)        
Repurchase and cancellaion of shares   (1,379,463)     (2,748,145)        
Repurchase and cancellaion of shares   (1,630,643)     (3,222,386)        
Dutch Auction Member
                  
Repurchase and cancellaion of shares (in Shares)         (7,570,236)        
Repurchase and cancellaion of shares         (1,514,047)        
Repurchase and cancellaion of shares         (4,379,400)        
Repurchase and cancellaion of shares         $ (5,893,447)