Other Long-Term Liabilities (Details) (USD $)	1 Months Ended			3 Months Ended
	Jan. 31, 2013	Jan. 31, 2012	Jan. 31, 2011	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Other Long-Term Liabilities
Deferred Rent				$ 434,000		$ 434,000
Net Deferred Tax Liability related to IPR&D				4,661,000		4,661,000
Deferred Income from Sale of Tax Benefits				1,630,000		1,118,000
Loan Payable				457,000		472,000
Other				43,000		39,000
Total				7,225,000		6,724,000
Less Current Portion				(557,000)		(388,000)
Long-Term Portion				6,668,000		6,336,000
Amount at which New Jersey tax benefit agreed to be sold	800,000	800,000	600,000	200,000	100,000
Amount of sale of New Jersey tax benefit	$ 800,000	$ 700,000	$ 500,000
Period for which base of operations must be maintained				5 years