Note 5 - Net Income Per Share (Detail)			3 Months Ended	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012 Stock Options [Member]	Sep. 30, 2012 Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount			1,462,500	1,462,500
Units of Partnership Interest, Amount	82,618,015	82,701,265