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Consolidated Statements of Operations and Comprehensive Loss - USD ($)
shares in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Revenues:      
Total revenues $ 313,789 $ 298,836 $ 253,227
Cost of products and preservation services:      
Total cost of products and preservation services 111,266 101,322 85,443
Gross margin 202,523 197,514 167,784
Operating expenses:      
General, administrative, and marketing 157,443 169,774 141,136
Research and development 38,879 35,546 24,207
Total operating expenses 196,322 205,320 165,343
Gain from sale of non-financial assets 0 (15,923) 0
Operating income 6,201 8,117 2,441
Interest expense 18,224 16,887 16,698
Interest income (147) (79) (217)
Other expense, net 3,108 6,136 3,134
Loss before income taxes (14,984) (14,827) (17,174)
Income tax expense (benefit) 4,208 7 (492)
Net loss $ (19,192) $ (14,834) $ (16,682)
Loss per share:      
Basic (in dollars per share) $ (0.48) $ (0.38) $ (0.44)
Diluted (in dollars per share) $ (0.48) $ (0.38) $ (0.44)
Weighted-average common shares outstanding:      
Basic (in shares) 40,032 38,983 37,861
Diluted (in shares) 40,032 38,983 37,861
Net loss $ (19,192) $ (14,834) $ (16,682)
Other comprehensive (loss) income:      
Foreign currency translation adjustments (11,722) (16,630) 15,332
Comprehensive loss (30,914) (31,464) (1,350)
Products      
Revenues:      
Total revenues 230,353 221,597 179,299
Cost of products and preservation services:      
Total cost of products and preservation services 72,166 65,196 50,128
Preservation services      
Revenues:      
Total revenues 83,436 77,239 73,928
Cost of products and preservation services:      
Total cost of products and preservation services $ 39,100 $ 36,126 $ 35,315