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Condensed Consolidated Statements of Income (Unaudited) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Condensed Consolidated Statements of Income [Abstract]
Net revenues	$ 13,054,278	$ 12,190,870	$ 38,110,946	$ 33,061,457
Costs and expenses:
Cost of products sold	1,341,256	909,434	3,411,354	2,632,447
Selling and marketing	5,060,546	5,692,048	16,253,574	17,147,683
Research and development	1,233,025	1,138,955	3,269,746	2,947,623
General and administrative	2,117,684	1,806,975	6,442,139	5,471,012
Amortization of product license right	171,727	171,732	515,180	515,184
Other	31,680	27,869	80,735	83,283
Total costs and expenses	9,955,918	9,747,013	29,972,728	28,797,232
Operating income	3,098,360	2,443,857	8,138,218	4,264,225
Interest income	52,459	48,675	147,628	159,688
Interest expense	(33,390)	(547,795)	(329,037)	(1,299,703)
Income before income taxes	3,117,429	1,944,737	7,956,809	3,124,210
Income tax expense	(1,278,472)	(943,141)	(3,238,421)	(1,529,339)
Net income	1,838,957	1,001,596	4,718,388	1,594,871
Net loss at subsidiary attributable to noncontrolling interests	8,455	6,648	27,803	24,255
Net income attributable to common shareholders	$ 1,847,412	$ 1,008,244	$ 4,746,191	$ 1,619,126
Earnings per share attributable to common shareholders
- basic	$ 0.09	$ 0.05	$ 0.23	$ 0.08
- diluted	$ 0.09	$ 0.05	$ 0.23	$ 0.08
Weighted-average shares outstanding
- basic	20,327,537	20,327,867	20,414,593	20,335,911
- diluted	20,534,647	20,803,182	20,657,567	21,135,762

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