CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 91,838	$ 115,924
Marketable securities	246,186	161,840
Accounts receivable	38,610	50,863
Unbilled receivables	182,934	176,613
Inventories	9,854	6,772
Assets held for sale	77,203	0
Prepaids and other current assets	9,824	15,738
Total current assets	656,449	527,750
Intangible assets, net	35,362	59,936
Goodwill	164,488	207,178
Property, plant and equipment, net	38,571	57,028
Operating lease right-of-use assets	15,503	0
Deferred tax assets	6,454	4,435
Unbilled receivables, long-term	376,619	497,003
Other assets	6,381	7,825
Total assets	1,299,827	1,361,155
Current liabilities:
Accounts payable	9,429	7,392
Accrued salaries and benefits	13,294	16,938
Deferred revenue	9,516	19,374
Income taxes payable, short-term	18,198	16,390
Operating lease liabilities	7,382	0
Liabilities held for sale	14,620	0
Other current liabilities	15,854	9,191
Total current liabilities	88,293	69,285
Convertible notes, long-term	147,039	141,934
Long-term imputed financing obligation	0	36,297
Long-term operating lease liabilities	9,415	0
Long-term income taxes payable	64,765	77,280
Other long-term liabilities	29,032	24,247
Total liabilities	338,544	349,043
Commitments and contingencies (Notes 11 and 15)
Stockholders’ equity:
Convertible preferred stock, $.001 par value: Authorized: 5,000,000 shares Issued and outstanding: no shares at September 30, 2019 and December 31, 2018	0	0
Common stock, $.001 par value: Authorized: 500,000,000 shares Issued and outstanding: 111,493,448 shares at September 30, 2019 and 109,017,708 shares at December 31, 2018	111	109
Additional paid-in capital	1,254,344	1,226,588
Accumulated deficit	(280,712)	(204,294)
Accumulated other comprehensive loss	(12,460)	(10,291)
Total stockholders’ equity	961,283	1,012,112
Total liabilities and stockholders’ equity	$ 1,299,827	$ 1,361,155