Stock-Based Compensation Plans (Details Textual) (USD $)	12 Months Ended				12 Months Ended								12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Apr. 20, 2007	Dec. 31, 2012 Directors deferred plan [Member]	Dec. 31, 2011 Directors deferred plan [Member]	Dec. 31, 2010 Directors deferred plan [Member]	Dec. 31, 2004 Directors deferred plan [Member]	Dec. 31, 2003 Directors deferred plan [Member]	Dec. 31, 2012 Directors stock plan [Member]	Dec. 31, 2012 2002 Plan [Member]	Dec. 31, 2012 2000 Plan [Member]	Dec. 31, 2012 Alan Rubino [Member]	Dec. 31, 2012 Michael Garone [Member]	Dec. 31, 2012 Gary Riley [Member]	Dec. 31, 2012 Timothy Rothwell [Member]	Dec. 31, 2012 Timothy McInerney [Member]	Dec. 31, 2012 Jacob Plotsker [Member]	Dec. 31, 2012 Mark Rachesky [Member]	Dec. 31, 2012 Michael Weiser [Member]	Dec. 31, 2012 John Harkey [Member]	Dec. 31, 2012 Maximum [Member]	Dec. 31, 2012 Maximum [Member] 1995 Plan [Member]	Dec. 31, 2012 Minimum [Member]	Dec. 31, 2012 Minimum [Member] 1995 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted to new members	2,736,750	309,000	662,750										2,000,000	45,000	30,000	215,000	90,000	90,000	40,000	40,000	40,000
Previously issued options to outside directors										5.00%
Maximum shares of common stock available for issuance										725,000	160,000	1,945,236
Expiry of Directors Stock Plan										Jan. 29, 2007
Directors' Deferred Compensation Stock Plan ceased date					2004-05
Shares available for future issuance	189,878										160,000
Expiry of vested option																						10 years	10 years	5 years	5 years
Shares of common stock reserved for issuance under the Directors' Deferred Plan					25,000
Shares earned by outside directors								1,775	2,144
Shares issuable under Directors' Deferred Plan					0
Awards granted					0	0	0
Deferred compensation stock plan awards outstanding					0
Deferred plans shares to be issued					Within six months after he or she ceases to serve on the Board of Directors
Stock-Based Compensation Plans (Textual) [Abstract]
Total compensation expense for share-based payment awards	$ 300,000	$ 300,000	$ 800,000
Compensation expense related to research and development	100,000	60,000	100,000
Compensation expense related to general and administrative expenses	200,000	200,000	700,000
Total unrecognized estimated compensation expense related to non-vested stock options granted	300,000
Stock plan expected to be recognized over a weighted-average period	2 years
Tax benefit realized	(2,974,000)
Number of Shares, Exercised	0	10,000
Cash received from options exercised		$ 6,000
Dividend yield	0.00%
Rate at option vested	20.00%
Approval date of 2007 Stock Award and Incentive Plan				Apr. 20, 2007
Issuance of aggregate shares	3,275,334
New shares issued under the plan	2,500,000
Shares transferred from 2000 Stock Option Plan	374,264
Shares transferred to 2007 plan from Directors Stock Plan	401,070
Weighted-average grant date fair value of options granted	$ 0.10	$ 0.91	$ 1.26