Concentration of Credit Risks - Additional Information (Detail) - Customer |
12 Months Ended | |
|---|---|---|
Dec. 29, 2018 |
Dec. 30, 2017 |
|
| Concentration Risk [Line Items] | ||
| Number of major customers | 3 | 3 |
| Sales percentage by customer percentage maximum (no more than) | 5.00% | |
| Accounts Receivable | ||
| Concentration Risk [Line Items] | ||
| Major customer, accounted percentage | 48.8443% | 27.00% |
| Total Revenues | ||
| Concentration Risk [Line Items] | ||
| Major customer, accounted percentage | 50.70% | 45.80% |
| Customer Concentration Risk | Total Revenues | UNITED STATES | ||
| Concentration Risk [Line Items] | ||
| Number of separate customers | 2 | |
| Customer Concentration Risk | Total Revenues | Minimum | ||
| Concentration Risk [Line Items] | ||
| Major customer, accounted percentage | 10.00% | |