CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
ASSETS
Cash and cash equivalents	$ 188,217	$ 176,225
Accounts receivable	5,050	7,500
Unbilled revenue/reimbursement	5	1,001
Contract assets		3,631
Non-cash royalty receivable	18,180	15,116
Prepaid and other current assets	7,875	5,425
Total current assets	219,327	208,898
Property and equipment, net of accumulated depreciation	5,578	6,993
Operating lease right-of-use assets	14,477	15,587
Other assets	8,570	3,784
Total assets	247,952	235,262
LIABILITIES AND SHAREHOLDERS? DEFICIT
Accounts payable	8,913	9,933
Accrued compensation	3,942	8,991
Other accrued liabilities	21,114	13,932
Convertible 4.5% senior notes, net of deferred financing costs of $11	2,089
Current portion of liability related to the sale of future royalties, net of deferred financing costs of $402 and $635, respectively	56,603	41,274
Current portion of operating lease liability	3,175	2,971
Current portion of deferred revenue	3,985	309
Total current liabilities	99,821	77,410
Deferred revenue, net of current portion	126,541	127,123
Operating lease liability, net of current portion	19,403	21,798
Convertible 4.5% senior notes, net of deferred financing costs of $22		2,078
Liability related to the sale of future royalties, net of current portion and deferred financing costs of $625 and $859, respectively	42,260	82,267
Other long-term liabilities	2,818	707
Total liabilities	290,843	311,383
Shareholders deficit:
Preferred stock, $.01 par value; authorized 5,000 shares; no shares issued and outstanding as of September 30, 2020 and December 31, 2020
Common stock, $.01 par value; authorized 300,000 and 200,000 shares; issued and outstanding 174,585 and 150,136 shares as of September 30, 2020 and December 31, 2019, respectively	1,746	1,501
Additional paid-in capital	1,318,591	1,209,846
Accumulated deficit	(1,363,228)	(1,287,468)
Total shareholders deficit	(42,891)	(76,121)
Total liabilities and shareholders deficit	$ 247,952	$ 235,262