CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 23,275	$ 26,485
Restricted cash	7	7
Accounts receivable and unbilled, net (includes $3.8 million and $1.0 million with related parties at December 31, 2018 and 2017, respectively)	133,449	83,079
Prepaid expenses and other current assets	21,383	20,400
Total current assets	178,114	129,971
Property and equipment, net	52,255	48,739
Goodwill	660,981	660,981
Intangible assets, net	69,179	98,740
Deferred income taxes	713	6,343
Other assets	6,691	5,943
Total assets	967,933	950,717
Current liabilities:
Accounts payable (includes $0.3 million and $0.2 million with related parties at December 31, 2018 and 2017, respectively)	16,737	16,674
Accrued expenses	87,493	23,673
Pre-funded study costs (includes $1.0 million with related parties at December 31, 2017)	0	57,406
Advanced billings (includes $0.4 million and $1.7 million with related parties at December 31, 2018 and 2017, respectively)	147,935	73,756
Current portion of long-term debt	0	16,500
Other current liabilities	4,861	4,697
Total current liabilities	257,026	192,706
Long-term debt, net, less current portion	79,721	205,111
Deemed landlord liability, less current portion	24,484	26,602
Deferred income tax liability	439	560
Deferred credit	3,756	11,468
Other long-term liabilities	12,804	10,740
Total liabilities	378,230	447,187
Commitments and contingencies (see Note 9)
Shareholders’ equity:
Preferred stock - $0.01 par-value; 5,000,000 shares authorized; no shares issued and outstanding at December 31, 2018 and 2017, respectively	0	0
Common stock - $0.01 par-value; 250,000,000 shares authorized at December 31, 2018 and 2017, respectively; 35,665,910 and 35,466,510 shares issued and outstanding at December 31, 2018 and 2017, respectively	356	355
Treasury stock - 200,000 shares at December 31, 2018 and 2017, respectively	(6,030)	(6,030)
Additional paid-in capital	639,381	630,341
Accumulated deficit	(41,487)	(120,402)
Accumulated other comprehensive loss	(2,517)	(734)
Total shareholders’ equity	589,703	503,530
Total liabilities and shareholders’ equity	$ 967,933	$ 950,717