Condensed Consolidated Statements Of Operations And Comprehensive Income (Loss) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Revenues:
Total revenues	$ 76,148	$ 53,771	$ 147,235	$ 120,200
Cost of products and preservation services:
Total cost of products and preservation services	25,635	17,881	48,884	40,139
Gross margin	50,513	35,890	98,351	80,061
Operating expenses:
General, administrative, and marketing	40,830	32,288	79,468	71,290
Research and development	8,360	5,522	16,114	11,878
Total operating expenses	49,190	37,810	95,582	83,168
Operating income (loss)	1,323	(1,920)	2,769	(3,107)
Interest expense	4,855	3,652	8,895	7,040
Interest income	(18)	(66)	(42)	(168)
Other (income) expense, net	(1,331)	(740)	600	2,922
Loss before income taxes	(2,183)	(4,766)	(6,684)	(12,901)
Income tax benefit	(5)	(1,077)	(1,368)	(2,547)
Net loss	$ (2,178)	$ (3,689)	$ (5,316)	$ (10,354)
Loss per common share:
Basic	$ (0.06)	$ (0.10)	$ (0.14)	$ (0.27)
Diluted	$ (0.06)	$ (0.10)	$ (0.14)	$ (0.27)
Weighted-average common shares outstanding:
Basic	38,943	37,520	38,841	37,455
Diluted	38,943	37,520	38,841	37,455
Net loss	$ (2,178)	$ (3,689)	$ (5,316)	$ (10,354)
Other comprehensive loss:
Foreign currency translation adjustments	2,973	4,434	(7,317)	(29)
Comprehensive income (loss)	795	745	(12,633)	(10,383)
Products [Member]
Revenues:
Total revenues	56,076	37,268	109,421	83,688
Cost of products and preservation services:
Total cost of products and preservation services	16,178	10,040	31,089	23,080
Preservation Services [Member]
Revenues:
Total revenues	20,072	16,503	37,814	36,512
Cost of products and preservation services:
Total cost of products and preservation services	$ 9,457	$ 7,841	$ 17,795	$ 17,059