Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - 2016 Equity Incentive Plan (Details)

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Stock-Based Compensation - 2016 Equity Incentive Plan (Details)
9 Months Ended
Jan. 01, 2017
shares
May 18, 2016
grant
shares
Sep. 30, 2017
shares
2015 Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Grants to be made under 2015 Plan | grant   0  
Common stock remaining for future issuance (in shares)   464,476  
2016 Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Increase in number of shares reserved for issuance (in shares)   600,000  
Common stock remaining for future issuance (in shares)     483,214
Annual share reserve increase (as a percent)     4.00%
Additional shares reserved for issuance 377,365