Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 118,708	$ 151,359
Short-term investment	13,089	0
Accounts receivable, net of allowances of approximately $7.1 million at December 31, 2017	0	3,496
Inventory, net	866	5,559
Prepaid expenses and other current assets	54,266	11,688
Current assets held for sale	320	391,202
Total current assets	187,249	563,304
Fixed assets, net	10,091	17,254
Goodwill	200,571	200,571
Restricted cash	5,410	5,541
Contingent purchase price from sale of businesses	325,806	80,700
Other assets	4,610	5,613
Total assets	733,737	872,983
Current liabilities:
Accounts payable	7,529	10,244
Accrued expenses	50,984	95,197
Current portion of contingent purchase price	0	4,995
Other current liabilities	122	4,476
Current liabilities held for sale	19,122	60,580
Total current liabilities	77,757	175,492
Contingent purchase price	0	14,655
Convertible senior notes	669,724	649,198
Other liabilities	12,820	8,724
Total liabilities	760,301	848,069
Stockholders’ equity:
Preferred stock, $1.00 par value per share, 5,000,000 shares authorized; no shares issued and outstanding	0	0
Common stock, $0.001 par value per share, 187,500,000 authorized; 76,877,965 issued and 73,864,822 outstanding at September 30, 2018 and 76,191,958 issued and 73,178,815 outstanding at December 31, 2017	76	76
Additional paid-in capital	1,406,229	1,377,393
Treasury stock, at cost; 3,013,143 and 3,013,143 shares at September 30, 2018 and December 31, 2017, respectively	(90,016)	(90,016)
Accumulated deficit	(1,338,248)	(1,257,356)
Accumulated other comprehensive loss	(4,605)	(5,183)
Total stockholders’ (deficit) equity	(26,564)	24,914
Total liabilities and stockholders’ (deficit) equity	$ 733,737	$ 872,983