Slicers (applies to each fact value in each table cell)

Reporting Entity [Axis]

0001326732 (http://www.sec.gov/CIK)

Condensed Balance Sheets	Period [Axis]
	2016-12-31	2015-12-31
Condensed Balance Sheets
Assets
Current assets
Cash and cash equivalents	14,528,000	12,590,000
Marketable securities	115,608,000	83,840,000
Accounts receivable	8,616,000	44,000
Prepaid expenses and other current assets	2,901,000	1,201,000
Total current assets	141,653,000	97,675,000
Property and equipment, net	3,105,000	2,310,000
Patents, licenses, and other intangible assets, net	10,362,000	9,971,000
Marketable securities - long term	273,340,000	96,891,000
Other assets	103,000	63,000
Total assets	428,563,000	206,910,000
Liabilities and stockholders' equity
Current liabilities
Accounts payable	3,880,000	6,400,000
Accrued expenses	6,692,000	3,634,000
Current portion of deferred rent	128,000	108,000
Current portion of deferred revenue	95,521,000	33,287,000
Income taxes	65,000
Total current liabilities	106,286,000	43,429,000
Deferred rent, less current portion	397,000	507,000
Deferred revenue, less current portion	7,926,000	542,000
Total liabilities	114,609,000	44,478,000
Commitments and contingencies (see note 8)	xsi:nil	xsi:nil
Stockholders' equity
Preferred stock, $0.01 par value: 10,000,000 authorized shares; -0- issued and outstanding shares at December 31, 2016 and 2015	xsi:nil	xsi:nil
Common stock, $0.01 par value: 200,000,000 authorized shares; 46,567,978 issued and outstanding shares at December 31, 2016 and 40,551,039 issued and outstanding at December 31, 2015	466,000	405,000
Additional paid-in capital	552,889,000	424,128,000
Accumulated other comprehensive loss	(1,441,000)	(516,000)
Accumulated deficit	(237,960,000)	(261,585,000)
Total stockholders' equity	313,954,000	162,432,000
Total liabilities and stockholders' equity	428,563,000	206,910,000