XML 77 R55.htm IDEA: XBRL DOCUMENT v3.7.0.1
Equity Plans - Schedule of Activity under Equity Incentive Plans (Detail) - 2007 and 2016 Equity Incentive Plans [Member] - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Options Available for Grant, Beginning balance 147,219 116,832 70,082  
Options Available for Grant, Additional options authorized 1,697,088 431,411 240,425  
Options Available for Grant, Options granted (1,679,979) (408,623) (199,519)  
Options Available for Grant, Options exercised 0 0 0  
Options Available for Grant, Options forfeited   7,599 5,844  
Options Available for Grant, Ending balance 164,328 147,219 116,832 70,082
Number of Options Outstanding, Beginning balance 833,178 476,006 284,879  
Number of Options Outstanding, Options granted 1,679,979 408,623 199,519  
Number of Options Outstanding, Options exercised (119,328) (43,852) (2,548)  
Number of Options Outstanding, Options forfeited   (7,599) (5,844)  
Number of Options Outstanding, Ending balance 2,393,829 833,178 476,006 284,879
Weighted-Average Exercise Price Per Share, Beginning balance $ 1.33 $ 1.40 $ 1.10  
Number of Options Outstanding, Options exercisable 492,714      
Weighted-Average Exercise Price Per Share, Options granted $ 14.24 1.24 1.83  
Number of Options Outstanding, Options vested and expected to vest 2,369,135      
Weighted-Average Exercise Price Per Share, Options exercised $ 1.28 1.30 1.30  
Weighted-Average Exercise Price Per Share, Options forfeited   1.40 1.13  
Weighted-Average Exercise Price Per Share, Ending balance 10.39 $ 1.33 $ 1.40 $ 1.10
Weighted-Average Exercise Price Per Share, Options exercisable 5.19      
Weighted-Average Exercise Price Per Share, Options vested and expected to vest $ 10.37      
Weighted-Average Remaining Contractual Life (years) 8 years 9 months 15 days 8 years 6 months 22 days 8 years 15 days 7 years 11 months 1 day
Weighted-Average Remaining Contractual Life (years), Options exercisable 7 years 8 months 12 days      
Weighted-Average Remaining Contractual Life (years), Options vested and expected to vest 8 years 9 months 15 days      
Aggregate Intrinsic Value, Options Outstanding $ 27,820      
Aggregate Intrinsic Value, Options exercisable 8,286      
Aggregate Intrinsic Value, Options vested and expected to vest $ 27,596