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Consolidated Statements of Operations and Comprehensive Income (Unaudited) - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Revenue $ 35,397 $ 24,723
Operating expenses:    
Cost of product revenue 14,200 7,311
Research & development 6,050 4,258
Selling, general & administrative 14,431 7,672
Goodwill impairment 18,144
Change in fair value of contingent consideration (24,522)
Total operating expenses 28,303 19,241
Income from operations 7,094 5,482
Interest and other income, net 279 498
Income before income taxes 7,373 5,980
Provision for income taxes 1,580 1,473
Net income $ 5,793 $ 4,507
Basic net income per share:    
Net income (in dollars per share) $ 0.41 $ 0.32
Basic weighted average common shares outstanding (in shares) 14,202 14,185
Diluted net income per share:    
Net income (in dollars per share) $ 0.40 $ 0.31
Diluted weighted average common shares outstanding (in shares) 14,353 14,314
Net income $ 5,793 $ 4,507
Foreign currency translation adjustment (129) (315)
Comprehensive income 5,664 4,192
Product [Member]    
Revenue 35,397 24,717
Service [Member]    
Revenue $ 6