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Consolidated Statements Of Operations And Comprehensive Income - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Revenues:        
Products $ 28,004 $ 19,859 $ 85,067 $ 59,168
Preservation services 17,248 16,844 50,284 46,892
Total revenues 45,252 36,703 135,351 106,060
Cost of products and preservation services:        
Products 6,598 4,278 21,299 13,555
Preservation services 8,872 9,443 26,348 28,302
Total cost of products and preservation services 15,470 13,721 47,647 41,857
Gross margin 29,782 22,982 87,704 64,203
Operating expenses:        
General, administrative, and marketing 20,592 17,494 69,302 55,790
Research and development 3,714 2,960 9,602 7,896
Total operating expenses 24,306 20,454 78,904 63,686
Gain from sale of business components     (7,915)  
Operating income 5,476 2,528 16,715 517
Interest expense 742 (78) 2,256 (18)
Interest income (18) (14) (48) (29)
Gain on sale of Medafor investment       (891)
Other expense (income), net 21 (238) (146) 204
Income before income taxes 4,731 2,858 14,653 1,251
Income tax expense (benefit) 1,738 713 6,772 (118)
Net income $ 2,993 $ 2,145 $ 7,881 $ 1,369
Income per common share:        
Basic $ 0.09 $ 0.08 $ 0.24 $ 0.05
Diluted $ 0.09 0.07 $ 0.24 0.05
Dividends declared per common share   $ 0.03   $ 0.09
Weighted-average common shares outstanding:        
Basic 32,151 27,823 31,731 27,687
Diluted 33,165 28,596 32,568 28,487
Other comprehensive loss $ (31) $ (349) $ (459) $ (124)
Comprehensive income $ 2,962 $ 1,796 $ 7,422 $ 1,245