Consolidated Statements Of Operations And Comprehensive Income - USD ($) shares in Thousands, $ in Thousands		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Revenues:
Products		$ 113,992	$ 83,081	$ 81,883
Preservation services		66,388	62,817	62,758
Total revenues		180,380	145,898	144,641
Cost of products and preservation services:
Products		28,033	18,663	17,167
Preservation services		33,448	36,516	36,183
Total cost of products and preservation services		61,481	55,179	53,350
Gross margin		118,899	90,719	91,291
Operating expenses:
General, administrative, and marketing		91,548	74,929	73,754
Research and development		13,446	10,436	8,699
Total operating expenses		104,994	85,365	82,453
Gain from sale of business components		(7,915)
Operating income		21,820	5,354	8,838
Interest expense		3,043	(62)	175
Interest income		(72)	(45)	(50)
Gain on sale of Medafor investment			(891)	(530)
Other expense, net		437	484	540
Income before income taxes		18,412	5,868	8,703
Income tax expense		7,634	1,863	1,381
Net income		$ 10,778	$ 4,005	$ 7,322
Income per common share:
Basic		$ 0.33	$ 0.14	$ 0.26
Diluted	[1]	0.32	0.14	0.25
Dividends declared per common share		$ 0	$ 0.120	$ 0.118
Weighted-average common shares outstanding:
Basic		31,855	27,744	27,379
Diluted		32,822	28,542	28,313
Other comprehensive (loss) income		$ (353)	$ 45	$ (128)
Comprehensive income		$ 10,425	$ 4,050	$ 7,194

[1] The Company excluded stock options from the calculation of diluted weighted-average common shares outstanding if the per share value, including the sum of (i) the exercise price of the options and (ii) the amount of the compensation cost attributed to future services and not yet recognized, was greater than the average market price of the shares, because the inclusion of these stock options would be antidilutive to income per common share. Accordingly, stock options to purchase 1,000, 710,000, and 335,000 shares for the years ended December 31, 2016, 2015, and 2014, respectively, were excluded from the calculation of diluted weighted-average common shares outstanding.