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Concentrations of Risk (Tables) | 12 Months Ended
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Dec. 29, 2018
Risks and Uncertainties [Abstract] |
Schedules of Concentration of Risk, by Risk Factor | Ongoing credit evaluations of customers’ financial condition are performed and collateral, such as letters of credit, are generally not required. Customer’s accounts receivable balance as a percentage of total accounts receivable was as follows:
| Percent of Gross Accounts Receivable
Customer | December 29, 2018 |  | December 30, 2017
Collins Aerospace | 11% |  | *
DRS Technologies | 11% |  | *
Scott Safety | * |  | 14%
RealWear, Inc. | 31% |  | 10%
U.S. Army | * |  | 43%
Note: The symbol “*” indicates that accounts receivables from that customer were less than 10% of the Company’s total accounts receivable. Sales to significant non-affiliated customers for fiscal years 2018, 2017 and 2016, as a percentage of total revenues, is as follows:
| Sales as a Percent of Total Revenue
| Fiscal Year
Customer | 2018 |  | 2017 |  | 2016
Military Customers in Total | 36% |  | 48% |  | 24%
General Dynamics | 11% |  | * |  | *
DRS Technologies | * |  | 10% |  | *
Collins Aerospace | 20% |  | 10% |  | 12%
Shenzhen Oriscape | * |  | * |  | 20%
U.S. Army | * |  | 12% |  | *
Funded Research and Development Contracts | 20% |  | 11% |  | 7%
Note: The symbol “*” indicates that sales to that customer were less than 10% of the Company’s total revenues. The caption "Military Customers in Total" excludes research and development contracts.

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