v3.6.0.2
STOCK-BASED COMPENSATION - Employee Stock Purchase Plan (Details) - Employee Stock Purchase Plan - ESPP - USD ($)
12 Months Ended
Jan. 01, 2016
Dec. 31, 2016
Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Increase to shares of common stock reserved for issuance 980,346    
Shares reserved for issuance under share-based compensation plan   1,575,605  
Offering period, term   1 year  
Percent of fair market value of common stock the price at which common stock is purchased   85.00%  
Maximum amount any participant may purchase per calendar year   $ 25,000  
Maximum number of shares to be purchased per employee in any six-month period   5,000  
Number of shares issued under ESPP   1,209,410 1,226,012
First day of fiscal years 2016 and 2017      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Maximum annual increase of common stock reserved for issuance under share-based compensation plan   1,000,000  
Maximum annual increase of common stock reserved for issuance under share-based compensation plan, as a percent of total shares outstanding   2.00%  
First day of fiscal years 2018 through 2023      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Maximum annual increase of common stock reserved for issuance under share-based compensation plan   1,000,000  
Maximum annual increase of common stock reserved for issuance under share-based compensation plan, as a percent of total shares outstanding   1.00%