Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Net cash flows from operating activities:
Net (loss) income	$ 2,401	$ (2,064)
Adjustments to reconcile net income (loss) to net cash from operating activities:
Depreciation and amortization	13,257	13,636
Non-cash compensation	6,581	4,685
Other non-cash adjustments to income (loss)	5,021	(1,330)
Changes in operating assets and liabilities:
Receivables	(4,496)	(2,310)
Inventories and deferred preservation costs	(3,864)	1,697
Prepaid expenses and other assets	(3,020)	(2,481)
Accounts payable, accrued expenses, and other liabilities	(1,113)	(12,473)
Net cash flows provided by (used in) operating activities	14,767	(640)
Net cash flows from investing activities:
Payments for Endospan agreements	(15,000)
Capital expenditures	(5,222)	(4,275)
Other	(531)	(722)
Net cash flows used in investing activities	(20,753)	(4,997)
Net cash flows from financing activities:
Repayment of term loan	(2,072)	(2,098)
Proceeds from exercise of stock options and issuance of common stock	4,519	3,793
Redemption and repurchase of stock to cover tax withholdings	(2,723)	(2,085)
Other	(560)	(888)
Net cash flows used in financing activities	(836)	(1,278)
Effect of exchange rate changes on cash, cash equivalents, and restricted securities	1,763	1,473
Decrease in cash, cash equivalents, and restricted securities	(5,059)	(5,442)
Cash, cash equivalents, and restricted securities beginning of year	42,236	40,753
Cash, cash equivalents, and restricted securities end of year	$ 37,177	$ 35,311