CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash flows from operating activities:
Net income	$ 40,228	$ 17,807
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	19,581	14,791
Non-cash interest expense	8,175	4,863
Stock-based compensation expense	12,492	9,459
Deferred income taxes, net	72	(9,680)
Loss on extinguishment of debt	(5,700)	5,650
Other	228	114
Changes in operating assets and liabilities, excluding impact of acquisitions:
Accounts receivable	(11,515)	(6,734)
Royalties and other receivables	157	26
Unbilled receivables	456	2,047
Inventories	(22,767)	(4,891)
Prepaid expenses and other assets	(2,908)	(1,075)
Operating lease right of use assets	2,574	787
Other assets	(260)	(66)
Accounts payable	3,317	(780)
Accrued expenses	(2,712)	7,263
Operating lease liability	(831)	(607)
Long-term liabilities	1,467	10,568
Total cash provided by operating activities	47,754	49,542
Cash flows from investing activities:
Acquisitions, net of cash acquired	(28,445)	(182,154)
Additions to capitalized software costs	(3,585)	(4,630)
Purchases of property, plant and equipment	(11,067)	(11,413)
Total cash used in investing activities	(43,097)	(198,197)
Cash flows from financing activities:
Proceeds from exercise of stock options	7,088	1,058
Payment of tax withholding obligation on vesting of restricted stock	(10)	(290)
Proceeds from issuance of convertible debt, net		278,555
Proceeds from issuance of common stock, net		320,713
Repayment of senior convertible notes		(114,989)
Total cash provided by financing activities	7,078	485,047
Effect of exchange rate changes on cash, cash equivalents and restricted cash	4,160	(7,785)
Net increase in cash, cash equivalents and restricted cash	15,895	328,607
Cash, cash equivalents and restricted cash, beginning of period	537,407	193,822
Cash, cash equivalents and restricted cash, end of period	553,302	522,429
Supplemental disclosure of non-cash investing and financing activities:
Assets acquired under operating leases	$ 1,456
Fair value of 2,316,229 shares of common stock issued for conversion of convertible notes		198,757
Fair value of common stock issued for acquisition of C Technologies, Inc.		$ 53,938