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Consolidated Statements Of Operations And Comprehensive (Loss) Income - USD ($)
shares in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Revenues:      
Total revenues $ 262,841 $ 189,702 $ 180,380
Cost of products and preservation services:      
Total cost of products and preservation services 89,857 61,060 61,481
Gross margin 172,984 128,642 118,899
Operating expenses:      
General, administrative, and marketing 140,574 101,211 91,548
Research and development 23,098 19,461 13,446
Total operating expenses 163,672 120,672 104,994
Gain from sale of business components     7,915
Operating income 9,312 7,970 21,820
Interest expense 15,788 4,881 3,043
Interest income (226) (212) (72)
Other expense (income), net 141 (260) 437
(Loss) income before income taxes (6,391) 3,561 18,412
Income tax (benefit) expense (3,551) (143) 7,634
Net (loss) income $ (2,840) $ 3,704 $ 10,778
(Loss) income per common share:      
Basic $ (0.08) $ 0.11 $ 0.33
Diluted [1] $ (0.08) $ 0.11 $ 0.32
Weighted-average common shares outstanding:      
Basic 36,412 33,008 31,855
Diluted 36,412 34,163 32,822
Net (loss) income $ (2,840) $ 3,704 $ 10,778
Other comprehensive (loss) income (7,929) 2,286 (353)
Comprehensive (loss) income (10,769) 5,990 10,425
Products [Member]      
Revenues:      
Total revenues 187,394 119,631 113,992
Cost of products and preservation services:      
Total cost of products and preservation services 53,772 29,798 28,033
Preservation Services [Member]      
Revenues:      
Total revenues 75,447 70,071 66,388
Cost of products and preservation services:      
Total cost of products and preservation services $ 36,085 $ 31,262 $ 33,448
[1] We excluded stock options from the calculation of diluted weighted-average common shares outstanding if the per share value, including the sum of (i) the exercise price of the options and (ii) the amount of the compensation cost attributed to future services and not yet recognized, was greater than the average market price of the shares, because the inclusion of these stock options would be antidilutive to (loss) income per common share. For the year ended December 31, 2018 all stock options and awards were excluded from the calculation of weighted-average common shares outstanding as these would be antidilutive to the net loss. For the years ended December 31, 2017 and 2016 stock options to purchase 227,000 and 1,000 shares, respectively, were excluded from the calculation of diluted weighted-average common shares outstanding.