Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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Amount after tax of increase (decrease) to equity or (increase) decrease to net assets, resulting from the cumulative effect adjustment of a new accounting principle applied in the period of adoption.

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Represents the compensation cost capitalized during the period arising from equity-based compensation arrangements (for example, shares of stock, units, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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Unrecognized cost of unvested share-based compensation awards.

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Unrecognized cost of unvested share-based awards, other than options, awarded to employees as compensation.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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STOCK-BASED COMPENSATION - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Dec. 30, 2017	Dec. 31, 2016	Jul. 01, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated share-based compensation expense	$ 3,939	$ 2,589	$ 7,138	$ 5,032
Unrecognized stock-based compensation expense	100		$ 100
Unrecognized stock-based compensation expense, weighted-average period for recognition			8 months 5 days
Restricted stock awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated share-based compensation expense	3,966	2,612	$ 7,430	5,203
Unrecognized stock-based compensation expense, weighted-average period for recognition			2 years 4 months 30 days
Unrecognized stock-based compensation expense other than options	35,500		$ 35,500
PSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated share-based compensation expense	500	$ 600	1,300	$ 1,200
Inventory
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation capitalized as inventory			900		$ 600
Accumulated Deficit \| Accounting Standards Update 2016-09
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cumulative effect adjustment	300		300
Additional Paid-in Capital \| Accounting Standards Update 2016-09
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cumulative effect adjustment	$ (300)		$ (300)