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CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Current assets:    
Cash and cash equivalents $ 151,871 $ 128,967
Marketable securities 267,857 373,682
Accounts receivable 46,674 27,903
Unbilled receivables 138,281 138,813
Inventories 8,085 14,466
Prepaids and other current assets 11,991 15,881
Total current assets 624,759 699,712
Intangible assets, net 62,431 36,487
Goodwill 279,091 183,222
Property, plant and equipment, net 51,516 57,693
Operating lease right-of-use assets 25,202 28,708
Deferred tax assets 3,846 4,353
Unbilled receivables 151,462 236,699
Other assets 4,359 4,535
Total assets 1,202,666 1,251,409
Current liabilities:    
Accounts payable 13,281 8,993
Accrued salaries and benefits 15,331 23,326
Deferred revenue 20,324 10,198
Income taxes payable 20,443 20,064
Operating lease liabilities 6,501 4,724
Other current liabilities 19,295 18,559
Total current liabilities 95,175 85,864
Convertible notes 161,733 156,031
Long-term operating lease liabilities 30,400 34,305
Long-term income taxes payable 25,797 41,333
Deferred tax liabilities 23,888 14,276
Other long-term liabilities 17,830 6,894
Total liabilities 354,823 338,703
Commitments and contingencies (Notes 9, 11 and 15)
Stockholders’ equity:    
Convertible preferred stock, $.001 par value: Authorized: 5,000,000 shares; Issued and outstanding: no shares at September 30, 2021 and December 31, 2020 0 0
Common stock, $.001 par value: Authorized: 500,000,000 shares; Issued and outstanding: 109,364,769 shares at September 30, 2021 and 111,697,994 shares at December 31, 2020 109 112
Additional paid-in capital 1,270,871 1,270,426
Accumulated deficit (422,737) (357,751)
Accumulated other comprehensive loss (400) (81)
Total stockholders’ equity 847,843 912,706
Total liabilities and stockholders’ equity $ 1,202,666 $ 1,251,409