Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Net cash flows from operating activities:
Net income (loss)	$ 5,266	$ (13,224)
Adjustments to reconcile net income (loss) to net cash from operating activities:
Depreciation and amortization	18,008	14,818
Non-cash compensation	7,471	7,432
Non-cash lease expense	5,566	5,324
Change in fair value of contingent consideration	4,970
Non-cash interest expense	2,025	2,261
Change in fair value of long-term loan		4,949
Deferred income taxes	(8,128)	(4,916)
Gain from sale of non-financial assets	(15,923)
Other	4,665	1,631
Changes in operating assets and liabilities:
Accounts payable, accrued expenses, and other liabilities	65	3,230
Prepaid expenses and other assets	(2,268)	(2,560)
Receivables	(8,032)	7,718
Inventories and deferred preservation costs	(16,986)	(19,744)
Net cash flows (used in) provided by operating activities	(3,301)	6,919
Net cash flows from investing activities:
Proceeds from sale of non-financial assets, net	19,000
Acquisition of Ascyrus, net of cash acquisition		(59,643)
Payments for Endospan agreements		(5,000)
Capital expenditures	(10,524)	(5,171)
Other	(4)	(968)
Net cash flows provided by (used in) investing activities	8,472	(70,782)
Net cash flows from financing activities:
Proceeds from exercise of stock options and issuance of common stock	3,531	2,079
Proceeds from issuance of convertible debt		100,000
Proceeds from revolving line of credit		30,000
Proceeds from financing insurance premiums		2,816
Repayment of revolving line of credit		(30,000)
Redemption and repurchase of stock to cover tax withholdings	(1,898)	(1,768)
Payment of debt issuance costs	(2,219)	(3,647)
Repayment of term loan	(2,397)	(3,727)
Other	(439)	(463)
Net cash flows (used in) provided by financing activities	(3,422)	95,290
Effect of exchange rate changes on cash, cash equivalents, and restricted securities	1,418	(1,086)
Increase in cash, cash equivalents, and restricted securities	3,167	30,341
Cash, cash equivalents, and restricted securities beginning of period	61,958	34,294
Cash, cash equivalents, and restricted securities end of period	$ 65,125	$ 64,635