Consolidated Statements of Operations and Comprehensive Loss - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Revenues:      
GI equipment and supplies $ 58,454 $ 48,824 $ 38,772
GI pathology services 13,846 12,595 12,119
Net revenues 72,300 61,419 50,891
Cost of revenues:      
GI equipment and supplies 43,745 33,815 21,502
GI pathology services 5,245 5,093 4,390
Cost of revenues 48,990 38,908 25,892
Gross profit 23,310 22,511 24,999
Operating expenses:      
Research and development 17,288 21,702 16,617
Sales and marketing 30,367 27,660 18,148
General and administrative 23,158 16,456 11,355
Amortization of intangible assets 2,753 3,908 4,578
Operating expenses 73,566 69,726 50,698
Operating loss (50,256) (47,215) (25,699)
Other income (expense):      
Other income (expense) (1,793) (1,563) 327
Interest expense (5,414) (3,950) (104)
Loss on early retirement of debt (2,282) 0 0
Total other income (expense) (9,489) (5,513) 223
Net loss before income taxes (59,745) (52,728) (25,476)
Income tax benefit (expense) 361 (916) 1,558
Net loss (59,384) (53,644) (23,918)
Other comprehensive income (loss):      
Foreign currency translation adjustments 562 (5,064) 3,050
Change in fair value of available-for-sale securities (116) 0 0
Other comprehensive loss 446 (5,064) 3,050
Comprehensive loss $ (58,938) $ (58,708) $ (20,868)
Net loss per share attributable to common stockholders, basic and diluted (in usd per share) $ (2.82) $ (4.30) $ (1.99)
Weighted-average shares of common stock used to compute net loss per share attributable to common stockholders, basic and diluted (in shares) 21,076,246 12,482,988 12,044,447