Consolidated Statements Of Operations And Comprehensive (Loss) Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Revenues:
Total revenues	$ 66,429	$ 67,505
Cost of products and preservation services:
Total cost of products and preservation services	22,258	23,232
Gross margin	44,171	44,273
Operating expenses:
General, administrative, and marketing	39,002	36,520
Research and development	6,356	5,548
Total operating expenses	45,358	42,068
Operating (loss) income	(1,187)	2,205
Interest expense	3,388	3,894
Interest income	(102)	(116)
Other expense, net	3,662	77
Loss before income taxes	(8,135)	(1,650)
Income tax benefit	(1,470)	(1,353)
Net loss	$ (6,665)	$ (297)
Loss per common share:
Basic	$ (0.18)	$ (0.01)
Diluted	$ (0.18)	$ (0.01)
Weighted-average common shares outstanding:
Basic	37,390	36,778
Diluted	37,390	36,778
Net loss	$ (6,665)	$ (297)
Foreign currency translation adjustments	(4,463)	(3,781)
Comprehensive loss	(11,128)	(4,078)
Products [Member]
Revenues:
Total revenues	46,420	48,401
Cost of products and preservation services:
Total cost of products and preservation services	13,040	13,826
Preservation Services [Member]
Revenues:
Total revenues	20,009	19,104
Cost of products and preservation services:
Total cost of products and preservation services	$ 9,218	$ 9,406