Consolidated Statements Of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Net cash flows from operating activities:
Net income	$ 10,778,000	$ 4,005,000	$ 7,322,000
Adjustments to reconcile net income to net cash from operating activities:
Gain from sale of business components	(7,915,000)
Gain on sale of Medafor investment		(891,000)	(530,000)
Depreciation and amortization	8,384,000	5,863,000	6,028,000
Non-cash compensation	6,328,000	5,089,000	3,436,000
Write-down of inventories and deferred preservation costs	1,364,000	1,341,000	680,000
Deferred income taxes	595,000	3,681,000	178,000
Other non-cash adjustments to income	268,000	268,000	(474,000)
Changes in operating assets and liabilities:
Receivables	4,142,000	(3,809,000)	(4,556,000)
Inventories and deferred preservation costs	(9,460,000)	(2,262,000)	(1,131,000)
Prepaid expenses and other assets	515,000	(1,187,000)	(2,771,000)
Accounts payable, accrued expenses, and other liabilities	4,720,000	(656,000)	(64,000)
Net cash flows provided by operating activities	19,719,000	11,442,000	8,118,000
Net cash flows from investing activities:
Acquisition of PhotoFix technology	(1,226,000)
Acquisition of French distribution business		1,349,000
Capital expenditures	(6,198,000)	(3,490,000)	(4,310,000)
Proceeds from sale of business components	19,795,000
Proceeds from sale of Medafor investment		891,000	530,000
Decrease in restricted cash	5,000,000
Sales and maturities of restricted securities and investments	1,067,000	1,157,000	639,000
Purchases of restricted securities and investments	(1,014,000)	(1,085,000)	(1,208,000)
Other	(126,000)	(610,000)	(1,004,000)
Net cash flows used in investing activities	(73,854,000)	(4,486,000)	(5,353,000)
Net cash flows from financing activities:
Proceeds from issuance of term loan	75,000,000
Repayment of term loan	(1,406,000)
Payment of debt issuance costs	(2,289,000)
Proceeds from exercise of stock options and issuance of common stock	2,203,000	1,526,000	2,675,000
Cash dividends paid		(3,408,000)	(3,295,000)
Repurchases of common stock			(5,588,000)
Redemption and repurchase of stock to cover tax withholdings	(697,000)	(1,386,000)	(1,483,000)
Other	617,000	458,000	738,000
Net cash flows provided by (used in) financing activities	73,428,000	(2,810,000)	(6,953,000)
Effect of exchange rate changes on cash	(239,000)	67,000	(80,000)
Increase (decrease) in cash and cash equivalents	19,054,000	4,213,000	(4,268,000)
Cash and cash equivalents, beginning of year	37,588,000	33,375,000	37,643,000
Cash and cash equivalents, end of year	56,642,000	$ 37,588,000	$ 33,375,000
On-X [Member]
Net cash flows from investing activities:
Acquisition of business, net of cash acquired	$ (91,152,000)