Condensed Consolidated Balance Sheets (USD $)	Sep. 30, 2013	Dec. 31, 2012
Current Assets:
Cash and cash equivalents	$ 14,914,675	$ 24,621,083
Accounts receivable	622,173	233,794
Prepaid expenses and other current assets	261,000	307,907
Total current assets	15,797,848	25,162,784
Equipment and leasehold improvements, net	226,861	253,595
Patents, net	1,865,007	1,689,804
Deposits and other assets	77,350	77,350
Total assets	17,967,066	27,183,533
Current Liabilities:
Accounts payable	2,098,661	1,027,872
Accrued expenses	818,654	2,168,382
Deferred contract revenue, current portion	1,498,587	5,419,623
Deferred rent, short-term portion	21,610	14,555
Total current liabilities	4,437,512	8,630,432
Deferred rent, long-term portion	76,574	93,381
Deferred contract revenue, long-term portion		415,000
Warrants	3,100,000	3,100,000
Total liabilities	7,614,086	12,238,813
Stockholders' Equity:
Common stock - $.001 par value; 100,000,000 shares authorized; 13,147,784 and 13,099,319 shares issued and outstanding at September 30, 2013 and December 31, 2012, respectively	13,148	13,099
Additional paid-in capital	58,414,265	57,845,088
Accumulated deficit	(48,074,433)	(42,913,467)
Total stockholders' equity	10,352,980	14,944,720
Total liabilities and stockholders' equity	$ 17,967,066	$ 27,183,533