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Leases - Leases Supplemental Balance Sheet Information (Details) - USD ($) $ in Thousands | Dec. 28, 2019 | Dec. 29, 2018
--- | --- | ---
Lessee, Lease, Description [Line Items] |  |
Operating lease assets | $ 968 |
Operating lease right-of-use assets - extensible list | us-gaap:OperatingLeaseRightOfUseAsset |
Accrued expenses and other current liabilities | $ 511 |
Accrued expenses and other current liabilities - extensible list | us-gaap:AccruedLiabilitiesCurrent |
Operating lease liabilities | $ 498 |
Operating lease liabilities - extensible list | us-gaap:OperatingLeaseLiabilityNoncurrent |
Total | $ 1,009 |
Total operating lease liabilities - extensible list | us-gaap:AccruedLiabilitiesCurrent us-gaap:OperatingLeaseLiabilityNoncurrent |
Property and equipment, at cost | $ 11,106 | $ 13,981
Accumulated depreciation | (10,820) | (13,702)
Property and equipment, net | 286 | $ 279
Accrued expenses and other current liabilities | $ 18 |
Accrued expenses and other current liabilities - extensible list | us-gaap:AccruedLiabilitiesCurrent |
Other liabilities | $ 65 |
Other liabilities - extensible list | us-gaap:OtherLiabilitiesNoncurrent |
Finance Lease, Liability | $ 83 |
Total finance lease liabilities - extensible list | us-gaap:AccruedLiabilitiesCurrent us-gaap:OtherLiabilitiesNoncurrent |
Finance leased assets |  |
Lessee, Lease, Description [Line Items] |  |
Property and equipment, at cost | $ 96 |
Accumulated depreciation | (14) |
Property and equipment, net | $ 82 |

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