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Consolidated Statements Of Cash Flows - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Net cash flows from operating activities:    
Net income $ 2,223 $ 2,541
Adjustments to reconcile net income to net cash from operating activities:    
Gain from sale of business components   (7,915)
Depreciation and amortization 2,168 1,929
Non-cash compensation 1,796 1,413
Other non-cash adjustments to income 625 791
Changes in operating assets and liabilities:    
Receivables 1,139 4,249
Inventories and deferred preservation costs (1,402) (2,760)
Prepaid expenses and other assets (1,053) 1,423
Accounts payable, accrued expenses, and other liabilities (1,627) (261)
Net cash flows provided by operating activities 3,869 1,410
Net cash flows from investing activities:    
Acquisition of On-X, net of cash acquired   (91,152)
Proceeds from sale of business components 740 19,795
Decrease in restricted cash   5,000
Capital expenditures (2,034) (820)
Other 48 22
Net cash flows used in investing activities (1,246) (67,155)
Net cash flows from financing activities:    
Proceeds from issuance of term loan   75,000
Repayment of term loan (469)  
Payment of debt issuance costs   (2,289)
Proceeds from exercise of stock options and issuance of common stock 1,287 736
Redemption and repurchase of stock to cover tax withholdings (1,300) (563)
Other (1) 228
Net cash flows (used in) provided by financing activities (483) 73,112
Effect of exchange rate changes on cash 100 (128)
Increase in cash and cash equivalents 2,240 7,239
Cash and cash equivalents, beginning of year 56,642 37,588
Cash and cash equivalents, end of year $ 58,882 $ 44,827