Consolidated Statement Of Operations And Comprehensive Income (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Revenues:
Products	$ 76,194	$ 67,496	$ 59,387
Preservation services	64,498	63,603	59,793
Other	71	619	446
Total revenues	140,763	131,718	119,626
Cost of products and preservation services:
Products	15,147	11,380	9,442
Preservation services	35,230	35,320	34,340
Total cost of products and preservation services:	50,377	46,700	43,782
Gross margin	90,386	85,018	75,844
Operating expenses:
General, administrative, and marketing	68,112	65,149	57,302
Research and development	8,454	7,257	6,899
Total operating expenses	76,566	72,406	64,201
Operating income	13,820	12,612	11,643
Interest expense	71	179	142
Interest income	(4)	(6)	(14)
Gain on sale of Medafor investment	(12,742)
Other than temporary investment impairment	3,229	340
Other (income) expense, net	(26)	47	49
Income before income taxes	23,292	12,052	11,466
Income tax expense	7,120	4,106	4,095
Net income	16,172	7,946	7,371
Income per common share:
Basic	$ 0.59	$ 0.29	$ 0.26
Diluted	$ 0.57	$ 0.28	$ 0.26
Dividends declared per share	$ 0.108	$ 0.050
Weighted-average common shares outstanding:
Basic	26,885	26,967	27,441
Diluted	27,698	27,411	27,759
Net income	16,172	7,946	7,371
Other comprehensive income (loss)	46	(33)	26
Comprehensive income	$ 16,218	$ 7,913	$ 7,397