SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Income Taxes and Recent Accounting Pronouncements (Details) - USD ($) |
12 Months Ended | ||
|---|---|---|---|
Dec. 30, 2016 |
Jan. 02, 2015 |
Jan. 01, 2016 |
|
| Income Taxes | |||
| Valuation reserve related to California net operating losses | $ 72,000 | $ 73,000 | |
| Reversal of valuation allowance | $ 4,600,000 | ||
| Early adoption effect | ASU 2016-09 | |||
| Income Taxes | |||
| Decrease to tax expense | $ 194,000 | ||