Summary Consolidated Statements of Operations (USD $) In Thousands, except Per Share data	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Revenues:
Preservation services	$ 14,688	$ 15,005	$ 30,362	$ 30,588
Products	14,580	14,146	29,009	28,101
Other	111	112	204	291
Total revenues	29,379	29,263	59,575	58,980
Cost of preservation services and products:
Preservation services	8,164	9,013	17,360	18,411
Products	2,162	2,481	4,658	5,008
Total cost of preservation services and products	10,326	11,494	22,018	23,419
Gross margin	19,053	17,769	37,557	35,561
Operating expenses:
General, administrative, and marketing	13,659	11,670	27,950	25,487
Research and development	1,643	1,240	3,409	2,532
Total operating expenses	15,302	12,910	31,359	28,019
Operating income	3,751	4,859	6,198	7,542
Interest expense	37	65	67	116
Interest income	(3)	(6)	(12)	(10)
Gain on valuation of derivative		(385)		(1,202)
Other (income) expense, net	(62)	111	(171)	231
Income before income taxes	3,779	5,074	6,314	8,407
Income tax expense	1,959	2,148	2,828	3,547
Net income	$ 1,820	$ 2,926	$ 3,486	$ 4,860
Income per common share:
Basic	$ 0.07	$ 0.10	$ 0.13	$ 0.17
Diluted	$ 0.07	$ 0.10	$ 0.13	$ 0.17
Weighted-average common shares outstanding:
Basic	27,385	28,246	27,385	28,240
Diluted	27,745	28,483	27,729	28,513