CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
ASSETS:
Cash and cash equivalents	$ 368,550	$ 91,131
Restricted cash and cash equivalents	4,091	4,089
Accounts receivable (net of allowance of $675 and $1,059, respectively)	53,444	41,382
Prepaid and other current assets	11,881	4,021
Current assets of discontinued operations	75	0
Total current assets	438,041	140,623
Property and equipment (net of accumulated depreciation of $13,043 and $9,739, respectively)	36,431	35,462
Goodwill	113,368	56,457
Intangible assets, net	81,125	71,684
Deferred income tax assets	20,156	14,610
Other non-current assets	1,910	810
Non-current assets of discontinued operations	2,428	3,781
Total assets	693,459	323,427
LIABILITIES:
Accounts payable, trade	9,250	5,593
Accrued expenses and other current liabilities	77,183	49,403
Current contingent consideration	46,576	0
Current liabilities of discontinued operations (Note 17)	14,507	11,711
Total current liabilities	147,516	66,707
Long-term debt	238,199	0
Non-current contingent consideration	11,273	23,600
Other non-current liabilities	1,597	1,685
Total liabilities	398,585	91,992
Commitments and contingencies (Notes 12 and 13)
SHAREHOLDERS' EQUITY:
Preferred stock $.01 par value; 5,000,000 shares authorized; none issued or outstanding	0	0
Common stock $.01 par value; 50,000,000 shares authorized; 14,218,572 and 13,955,378 shares issued, respectively, and 11,979,434 and 11,791,633 shares outstanding, respectively	142	140
Additional paid-in capital	1,087,582	1,018,010
Accumulated deficit	(708,354)	(722,630)
Treasury stock; 2,239,138 and 2,163,745 shares, respectively	(85,085)	(64,085)
Noncontrolling interest (Note 6)	589	0
Total shareholders' equity	294,874	231,435
Total liabilities and shareholders' equity	$ 693,459	$ 323,427