Consolidated Statements Of Operations And Comprehensive Income - USD ($) shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Revenues:
Products	$ 30,045,000	$ 19,918,000	$ 57,063,000	$ 39,309,000
Preservation services	17,038,000	15,608,000	33,036,000	30,048,000
Total revenues	47,083,000	35,526,000	90,099,000	69,357,000
Cost of products and preservation services:
Products	7,698,000	4,244,000	14,701,000	9,277,000
Preservation services	9,084,000	9,728,000	17,476,000	18,859,000
Total cost of products and preservation services	16,782,000	13,972,000	32,177,000	28,136,000
Gross margin	30,301,000	21,554,000	57,922,000	41,221,000
Operating expenses:
General, administrative, and marketing	22,436,000	19,327,000	48,710,000	38,296,000
Research and development	3,279,000	2,684,000	5,888,000	4,936,000
Total operating expenses	25,715,000	22,011,000	54,598,000	43,232,000
Gain from sale of business components			(7,915,000)
Operating income (loss)	4,586,000	(457,000)	11,239,000	(2,011,000)
Interest expense	797,000	30,000	1,514,000	60,000
Interest income	(18,000)	(12,000)	(30,000)	(15,000)
Gain on sale of Medafor investment		(891,000)		(891,000)
Other (income) expense, net	(58,000)	250,000	(167,000)	442,000
Income (loss) before income taxes	3,865,000	166,000	9,922,000	(1,607,000)
Income tax expense (benefit)	1,518,000	668,000	5,034,000	(831,000)
Net income (loss)	$ 2,347,000	$ (502,000)	$ 4,888,000	$ (776,000)
Income (loss) per common share:
Basic	$ 0.07	$ (0.02)	$ 0.15	$ (0.03)
Diluted	$ 0.07	(0.02)	$ 0.15	(0.03)
Dividends declared per common share		$ 0.03		$ 0.06
Weighted-average common shares outstanding:
Basic	32,010	27,713	31,519	27,619
Diluted	32,764	27,713	32,270	27,619
Other comprehensive (loss) income	$ (332,000)	$ 342,000	$ (428,000)	$ 225,000
Comprehensive income (loss)	$ 2,015,000	$ (160,000)	$ 4,460,000	$ (551,000)