Note 13 - Stock-Based Compensation (Detail) - Stock-Based Compensation Expense (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Stock-based compensation	$ 4,033,402	$ 4,348,138	$ 5,864,969
Selling and Marketing Expense [Member] | Segment, Continuing Operations [Member]
Stock-based compensation	347,555	567,380	412,183
Product Development And Content [Member] | Segment, Continuing Operations [Member]
Stock-based compensation	1,856,624	953,742	918,844
General and Administrative Expense [Member] | Segment, Continuing Operations [Member]
Stock-based compensation	1,677,717	2,096,258	4,533,942
Segment, Continuing Operations [Member]
Stock-based compensation	3,881,896	3,617,380	5,864,969
Segment, Discontinued Operations [Member]
Stock-based compensation	$ 151,506	$ 730,758