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Consolidated Statements Of Operations And Comprehensive (Loss) Income - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Revenues:        
Total revenues $ 64,598 $ 43,999 $ 195,042 $ 136,876
Cost of products and preservation services:        
Total cost of products and preservation services 21,884 14,137 67,249 44,597
Gross margin 42,714 29,862 127,793 92,279
Operating expenses:        
General, administrative, and marketing 32,871 24,756 104,946 71,016
Research and development 5,225 4,277 16,314 13,098
Total operating expenses 38,096 29,033 121,260 84,114
Operating income 4,618 829 6,533 8,165
Interest expense 4,104 851 11,863 2,486
Interest income (52) (64) (141) (159)
Other (income) expense, net (1,542) 21 (257) (70)
Income (loss) before income taxes 2,108 21 (4,932) 5,908
Income tax expense (benefit) 543 (1,304) (2,868) (803)
Net income (loss) $ 1,565 $ 1,325 $ (2,064) $ 6,711
Income (loss) per common share:        
Basic $ 0.04 $ 0.04 $ (0.06) $ 0.20
Diluted $ 0.04 $ 0.04 $ (0.06) $ 0.19
Weighted-average common shares outstanding:        
Basic 36,526 32,887 36,331 32,665
Diluted 37,610 34,057 36,331 33,851
Net income (loss) $ 1,565 $ 1,325 $ (2,064) $ 6,711
Other comprehensive income (loss):        
Foreign currency translation adjustments (514) 217 (5,140) 582
Comprehensive income (loss) 1,051 1,542 (7,204) 7,293
Products [Member]        
Revenues:        
Total revenues 45,152 27,029 138,063 84,519
Cost of products and preservation services:        
Total cost of products and preservation services 12,459 6,220 40,166 21,196
Preservation Services [Member]        
Revenues:        
Total revenues 19,446 16,970 56,979 52,357
Cost of products and preservation services:        
Total cost of products and preservation services $ 9,425 $ 7,917 $ 27,083 $ 23,401