Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Net cash flows from operating activities:
Net income	$ 5,386	$ 4,888
Adjustments to reconcile net income to net cash from operating activities:
Gain from sale of business components		(7,915)
Depreciation and amortization	4,352	4,089
Non-cash compensation	3,796	2,869
Other non-cash adjustments to income	1,034	4,696
Changes in operating assets and liabilities:
Receivables	(3,961)	2,097
Inventories and deferred preservation costs	(4,023)	(4,373)
Prepaid expenses and other assets	(3,335)	(426)
Accounts payable, accrued expenses, and other liabilities	(1,227)	(87)
Net cash flows provided by operating activities	2,022	5,838
Net cash flows from investing activities:
Acquisition of On-X, net of cash acquired		(91,152)
Acquisition of PhotoFix technology		(1,226)
Proceeds from sale of business components	740	19,795
Decrease in restricted cash		5,000
Capital expenditures	(4,335)	(1,608)
Other	36	30
Net cash flows used in investing activities	(3,559)	(69,161)
Net cash flows from financing activities:
Proceeds from issuance of term loan		75,000
Repayment of term loan	(2,978)	(469)
Payment of debt issuance costs		(2,289)
Proceeds from exercise of stock options and issuance of common stock	1,765	1,027
Redemption and repurchase of stock to cover tax withholdings	(1,552)	(562)
Other	(2)	346
Net cash flows (used in) provided by financing activities	(2,767)	73,053
Effect of exchange rate changes on cash	169	(383)
(Decrease) increase in cash and cash equivalents	(4,135)	9,347
Cash and cash equivalents, beginning of period	56,642	37,588
Cash and cash equivalents, end of period	$ 52,507	$ 46,935