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STOCK-BASED COMPENSATION - ADDITIONAL INFORMATION (Detail) - USD ($)
6 Months Ended
Jun. 02, 2017
Jun. 30, 2017
Jun. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of options for every share issued (in shares)   1.75  
Percentage of fair market value on the purchase date   85.00%  
Maximum number of shares per employee (in shares)   2,000  
Employee stock purchase plan offering period   6 months  
Maximum value of shares per employee   $ 25,000  
Common stock reserved for issuance (in shares)   1,000,000  
Shares purchased by employee since inception of ESPP (in shares)   677,050  
Shares purchased under ESPP (in shares)   27,667 17,711
Unrecognized compensation cost   $ 8,300,000  
Standard and market condition stock options outstanding      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock-based payment award vesting period (years)   4 years  
Shares reserved for issuance 3,476,850    
Standard and market condition stock options outstanding | Minimum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock-based payment award expiration period (years)   7 years  
Standard and market condition stock options outstanding | Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock-based payment award expiration period (years)   10 years  
Restricted stock awards outstanding      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock-based payment award vesting period (years)   1 year  
Unrecognized compensation cost, recognized over an estimated weighted-average period (years)   11 months 1 day  
RSUs outstanding      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock-based payment award vesting period (years)   3 years  
Unrecognized compensation cost, recognized over an estimated weighted-average period (years)   2 years 7 months 6 days  
Standard Stock Options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Unrecognized compensation cost, recognized over an estimated weighted-average period (years)   2 years 5 months 12 days  
Market Condition Based Stock Options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Unrecognized compensation cost, recognized over an estimated weighted-average period (years)   2 years 6 months 29 days