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)