Summary Consolidated Statements Of Operations (USD $) In Thousands, except Per Share data	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Revenues:
Preservation services	$ 14,656	$ 15,111	$ 45,018	$ 45,699
Products	14,923	13,175	43,932	41,276
Other	75	157	279	448
Total revenues	29,654	28,443	89,229	87,423
Cost of preservation services and products:
Preservation services	8,349	8,911	25,709	27,322
Products	2,393	4,310	7,051	9,318
Total cost of preservation services and products	10,742	13,221	32,760	36,640
Gross margin	18,912	15,222	56,469	50,783
Operating expenses:
General, administrative, and marketing	14,726	11,376	42,676	36,863
Research and development	1,690	1,590	5,099	4,122
Acquired in-process research and development		3,513		3,513
Total operating expenses	16,416	16,479	47,775	44,498
Operating income (loss)	2,496	(1,257)	8,694	6,285
Interest expense	49	29	116	145
Interest income	(1)	(6)	(13)	(16)
Gain on valuation of derivative		(143)		(1,345)
Other than temporary investment impairment		3,638		3,638
Other expense (income), net	159	(187)	(12)	44
Income (loss) before income taxes	2,289	(4,588)	8,603	3,819
Income tax expense (benefit)	270	(1,557)	3,098	1,990
Net income (loss)	$ 2,019	$ (3,031)	$ 5,505	$ 1,829
Income (loss) per common share:
Basic	$ 0.07	$ (0.11)	$ 0.20	$ 0.07
Diluted	$ 0.07	$ (0.11)	$ 0.20	$ 0.06
Weighted-average common shares outstanding:
Basic	27,523	27,783	27,431	28,086
Diluted	27,850	27,783	27,765	28,356