CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
ASSETS
Cash and cash equivalents	$ 176,225	$ 262,252
Accounts receivable	7,500	1,701
Unbilled revenue/reimbursement	1,001	617
Contract asset	3,631	500
Non-cash royalty receivable	15,116	9,249
Prepaid and other current assets	5,425	4,462
Total current assets	208,898	278,781
Property and equipment, net of accumulated depreciation	6,993	12,891
Operating lease right-of-use assets	15,587
Other assets	3,784	3,709
Total assets	235,262	295,381
LIABILITIES AND SHAREHOLDERS (DEFICIT) EQUITY
Accounts payable	9,933	11,365
Accrued compensation	8,991	11,796
Other accrued liabilities	13,932	20,465
Current portion of deferred lease incentive		837
Current portion of liability related to the sale of future royalties, net of deferred financing costs of $635 and $753, respectively	41,274	25,880
Current portion of operating lease liability	2,971
Current portion of deferred revenue	309	317
Total current liabilities	77,410	70,660
Deferred lease incentive, net of current portion		4,675
Deferred revenue, net of current portion	127,123	80,485
Operating lease liability - net of current portion	21,798
Convertible 4.5% senior notes, net of deferred financing costs of $22 and $36, respectively	2,078	2,064
Liability related to the sale of future royalties, net of current portion and deferred financing costs of $859 and $1,536, respectively	82,267	122,345
Other long-term liabilities	707	4,180
Total liabilities	311,383	284,409
Commitments and contingencies (Note K)
Shareholders' deficit:
Preferred stock, $.01 par value; authorized 5,000 shares; no shares issued and outstanding
Common stock, $0.01 par value; authorized 200,000 shares; issued and outstanding 150,136 and 149,400 shares as of December 31, 2019 and December 31, 2018, respectively	1,501	1,494
Additional paid-in capital	1,209,846	1,192,813
Accumulated deficit	(1,287,468)	(1,183,335)
Total shareholders' (deficit) equity	(76,121)	10,972
Total liabilities and shareholders' (deficit) equity	$ 235,262	$ 295,381