CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands		Sep. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents		$ 19,193	$ 103,771
Restricted cash	[1]	21	6,089
Marketable securities, current		897	28,230
Accounts receivable, net of allowances for bad debt of $3,318 and $4,599 at September 30, 2019 and December 31, 2018, respectively	[2]	73,574	102,798
Prepaid expenses		17,096	45,058
Other current assets		4,934	8,508
Total current assets		115,715	294,454
Marketable securities, non-current		0	6,658
Property and equipment, net		35,631	67,937
Operating lease right-of-use assets		55,308
Goodwill		220,367	224,899
Intangible assets, net		81,172	98,706
Other assets		7,769	8,982
Equity method investment		0	1,619
Total assets		515,962	703,255
Current liabilities:
Accounts payable		15,496	13,576
Accrued expenses		54,219	59,545
Deferred revenues, current		53,789	57,101
Short-term convertible debt, net of debt issuance costs		0	113,542
Total current liabilities		123,504	243,764
Lease financing obligation		0	9,494
Operating lease liabilities, non-current		62,863
Deferred tax liabilities		1,270	1,347
Deferred revenues, non-current		34,018	59,841
Other non-current liabilities		4,624	10,797
Redeemable noncontrolling interest		12,500	12,500
Commitments and contingencies (Note 13)
Series A Convertible Participating Perpetual Preferred Stock, $0.0001 par value; 10,000 shares authorized; 210 shares issued and outstanding at September 30, 2019		192,596	176,603
Stockholders’ equity:
Common stock, $0.0001 par value; 100,000 shares authorized, 51,608 and 49,836 shares issued; 44,446 and 42,674 outstanding at September 30, 2019 and December 31, 2018, respectively		5	5
Treasury stock, at cost (7,162 and 7,162 shares at September 30, 2019 and December 31, 2018, respectively)		(82,087)	(82,087)
Additional paid-in capital		528,734	534,673
Accumulated other comprehensive loss		(33,880)	(30,383)
Accumulated deficit		(328,185)	(233,299)
Total stockholders’ equity		84,587	188,909
Total liabilities and stockholders’ equity		$ 515,962	$ 703,255

[1] See Note 2. Basis of Presentation and Consolidation for restricted cash details.

[2] See Note 6. Investments in Affiliates and Related Transactions for related party transactions reflected in this account.