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Note 12 - Stockholders's Equity: (Detail) - Unaudited table summarizes stockholders’ equity transactions: (USD $) | 0 Months Ended | 3 Months Ended | 6 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Dec. 15, 2011 | Jun. 30, 2012 | Mar. 31, 2012 | Jun. 30, 2011 | Jun. 30, 2012 | Jun. 30, 2011 | Dec. 31, 2012 | Mar. 30, 2012 | Jan. 23, 2012 | Dec. 30, 2011
Balance (in Shares) |  |  |  |  |  |  |  | 46,221,465 | 46,047,053 | 53,497,584
Balance |  |  | $ 11,358,959 |  | $ 11,358,959 |  | $ 10,233,628 | $ 9,952,314 |  | $ 11,358,959
Balance |  |  | 40,994,013 |  | 40,994,013 |  | 35,109,427 | 36,700,388 |  | 40,994,013
Balance |  |  | (21,933,985) |  | (21,933,985) |  | (19,574,368) | (20,270,366) |  | (21,933,985)
Balance |  |  | 30,418,987 |  | 30,418,987 |  | 25,768,687 | 26,382,336 |  | 30,418,987
Balance (in Shares) |  | 45,484,997 |  |  | 45,484,997 |  | 45,484,997 |  |  |
Balance |  | 10,233,628 |  |  | 10,233,628 |  | 10,233,628 | 9,952,314 |  | 11,358,959
Balance |  | 35,109,427 |  |  | 35,109,427 |  | 35,109,427 | 36,700,388 |  | 40,994,013
Balance |  | (19,574,368) |  |  | (19,574,368) |  | (19,574,368) | (20,270,366) |  | (21,933,985)
Balance |  | 25,768,687 |  |  | 25,768,687 |  | 25,768,687 | 26,382,336 |  | 30,418,987
Exercise of stock options (in Shares) |  | 378,936 |  |  | 673,153 | 7,250 |  |  |  |
Exercise of stock options |  | 504,375 |  |  | 611,777 |  |  |  |  |
Exercise of stock options |  | (285,375) |  |  | (262,065) |  |  |  |  |
Exercise of stock options |  | 219,000 |  |  | 349,712 |  |  |  |  |
Repurchase and cancellaion of shares (in Shares) |  | 1,115,304 | 7,570,236 |  | 1,115,304 |  |  |  |  |
Repurchase and cancellaion of shares | 5,829,082 |  | 5,829,082 |  |  |  |  |  |  |
Cancellation of restricted stock (in Shares) |  | (100) |  |  | (200) |  |  |  |  |
Stock-based compensation |  | 63,096 |  |  | 125,561 |  |  |  |  |
Stock-based compensation |  | 63,096 |  |  | 125,561 |  |  |  |  |
Net income for the period |  | 695,998 |  | 565,659 | 2,359,617 | 1,293,605 |  |  |  |
Net income for the period |  | 695,998 |  | 565,659 | 2,359,617 | 1,293,605 |  |  |  |
Normal Course Issuer Bid Member |  |  |  |  |  |  |  |  |  |
Repurchase and cancellaion of shares (in Shares) |  | (1,115,304) |  |  | (1,115,304) |  |  |  |  |
Repurchase and cancellaion of shares |  | (223,061) |  |  | (223,061) |  |  |  |  |
Repurchase and cancellaion of shares |  | (1,368,682) |  |  | (1,368,682) |  |  |  |  |
Repurchase and cancellaion of shares |  | (1,591,743) |  |  | (1,591,743) |  |  |  |  |
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) |  |  |  |  |

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- Definition Aggregate par or stated value of issued nonredeemable common stock (or common stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable common shares, par value and other disclosure concepts are in another section within stockholders' equity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 30 -Article 5 + Details
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