Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 155,759	$ 139,741
Marketable securities	247	245
Accounts receivable, net of allowance for doubtful accounts of $15 and $120, respectively	34,319	30,384
Other receivables	6,968	12,572
Inventories	6,405	4,176
Prepaid expenses and other assets	2,954	3,507
Total current assets	206,652	190,625
Property and equipment, net of accumulated depreciation	643	918
Intangible assets, net of accumulated amortization and impairment charges	178,312	190,335
Goodwill	17,997	17,960
Other assets	25,600	19,211
Total assets	429,204	419,049
Current liabilities:
Accounts payable and other accrued liabilities	48,208	56,539
Accrued payroll and benefits	6,496	8,188
Deferred revenue	3,461	6,130
Drug development liability	156	259
Acquisition-related contingent obligations	0	5,227
Total current liabilities	58,321	76,343
Drug development liability, less current portion	14,227	14,427
Deferred revenue, less current portion	750	383
Acquisition-related contingent obligations, less current portion	1,993	1,439
Deferred tax liability	6,831	6,779
Other long-term liabilities	8,661	7,444
Convertible senior notes	102,522	99,377
Total liabilities	193,305	206,192
Commitments and contingencies
Stockholders’ equity:
Preferred stock	0	0
Common stock, $0.001 par value; 175,000,000 shares authorized; 75,902,704 and 68,228,935 shares issued and outstanding at June 30, 2016 and December 31, 2015, respectively	75	68
Additional paid-in capital	606,220	552,108
Accumulated other comprehensive loss	(2,651)	(5,319)
Accumulated deficit	(367,745)	(334,123)
Total stockholders’ equity	235,899	212,857
Total liabilities and stockholders’ equity	429,204	419,049
Series B junior participating preferred stock [Member]
Stockholders’ equity:
Preferred stock	0	0
Series E Convertible Voting Preferred Stock [Member]
Stockholders’ equity:
Preferred stock	$ 0	$ 123