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Short Term Debt - Additional Information (Details) - USD ($) |  |  |  |  |  | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Jul. 01, 2019 | Jun. 01, 2019 | Oct. 01, 2018 | Jul. 02, 2018 | Jul. 01, 2018 | Dec. 28, 2019 | Dec. 30, 2017 | Dec. 29, 2018 | Aug. 14, 2017
Short Term Debt [Line Items] |  |  |  |  |  |  |  |  |  |
Short term debt |  |  |  |  |  | $ 280,000 |  | $ 675,000 | [1] |
AFCO Financing Agreement to Fund Annual Premiums Due June 1, 2018 |  |  |  |  |  |  |  |  |  |
Short Term Debt [Line Items] |  |  |  |  |  |  |  |  |  |
Debt issuance date |  |  |  | Jul. 02, 2018 |  |  |  |  |  |
Debt face amount |  |  |  | $ 556,000 |  |  |  |  |  |
Debt interest rate |  |  |  | 4.50% |  |  |  |  |  |
Debt maturity date |  |  |  | Mar. 01, 2019 |  |  |  |  |  |
Initial down payment |  |  |  |  | $ 56,000 |  |  |  |  |
Frequency of periodic payment |  |  |  |  |  | monthly |  |  |  |
Monthly principal payments |  |  | $ 65,000 |  | $ 57,000 |  |  |  |  |
AFCO Financing Agreement to Fund Annual Premiums Due June 1, 2019 |  |  |  |  |  |  |  |  |  |
Short Term Debt [Line Items] |  |  |  |  |  |  |  |  |  |
Debt issuance date |  | Jun. 01, 2019 |  |  |  |  |  |  |  |
Debt face amount |  | $ 471,000 |  |  |  |  |  |  |  |
Debt interest rate |  | 4.90% |  |  |  |  |  |  |  |
Debt maturity date |  | Mar. 01, 2020 |  |  |  |  |  |  |  |
Initial down payment | $ 103,000 |  |  |  |  |  |  |  |  |
Frequency of periodic payment |  |  |  |  |  | monthly |  |  |  |
Monthly principal payments | $ 54,000 |  |  |  |  |  |  |  |  |
MidCap Financial Trust | Term Loan |  |  |  |  |  |  |  |  |  |
Short Term Debt [Line Items] |  |  |  |  |  |  |  |  |  |
Debt issuance date |  |  |  |  |  |  | May 10, 2017 |  |  |
Maximum borrowing capacity |  |  |  |  |  |  | $ 12,000,000 |  |  |
Maximum borrowing capacity subject to increase under certain terms and conditions, amount |  |  |  |  |  |  | $ 16,000,000 |  |  |
Maturity date, description |  |  |  |  |  | The MidCap Revolver had a stated maturity date of May 10, 2020. |  |  |  |
AFCO Financing Agreement |  |  |  |  |  |  |  |  |  |
Short Term Debt [Line Items] |  |  |  |  |  |  |  |  |  |
Short term debt |  |  |  |  |  | $ 155,000 |  | $ 193,000 |  |
GE 8% Loan Agreement |  |  |  |  |  |  |  |  |  |
Short Term Debt [Line Items] |  |  |  |  |  |  |  |  |  |
Debt interest rate |  |  |  |  |  |  |  |  |  | 8.00%
[1] | As of December 31, 2018, the Company has $419 of unamortized debt issuance costs associated with a revolving credit facility. Because there was no balance outstanding on the credit facility as of December 31, 2018, the Company should have reclassified the debt issuance costs from a contra liability to a deferred asset.

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