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Debt (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands |  | 12 Months Ended |
--- | --- | --- | ---
Aug. 27, 2018 | Dec. 28, 2019 | Dec. 29, 2018 | Nov. 18, 2015
Long-term debt |  |  |  |
Original issue discount |  | $ 170 | $ 170 |
Exercise price of warrants (in dollars per share) |  | $ 0.62 |  |
Interest expense |  | $ (945) | (739) |
Debt outstanding |  | 16,205 | 17,722 |
Debt, net of discounts and costs |  | 16,645 |  |
Outstanding principal and accrued interest |  | 412 | 376 |
Debt issuance costs |  |  | 23 |
Proceeds from issuance of debt, net of $170 discount |  |  | 2,100 |
SVIC Warrant |  |  |  |
Long-term debt |  |  |  |
Number of shares which may be purchased under warrant |  |  |  | 2,000,000
Exercise price of warrants (in dollars per share) |  |  |  | $ 0.30
Fair value of warrants |  |  |  | $ 1,200
Senior Secured Convertible Note Due December 2025 [member] |  |  |  |
Long-term debt |  |  |  |
Face amount |  |  |  | $ 15,000
Interest rate (as a percent) |  |  |  | 2.00%
Debt conversion price (in dollars per share) |  |  |  | $ 1.25
Debt outstanding |  | 16,233 | 15,934 |
Debt, net of discounts and costs |  | 15,800 | 15,200 |
Senior Secured Convertible Note Due December 2025 [member] | SVIC Warrant |  |  |  |
Long-term debt |  |  |  |
Interest expense |  | $ 200 | 200 |
Effective interest rate |  | 3.40% |  |
Unsecured Convertible Note Due August 2020 |  |  |  |
Long-term debt |  |  |  |
Face amount | $ 2,300 |  |  |
Original issue discount | $ 200 |  |  |
Interest rate (as a percent) | 8.00% |  |  |
Debt conversion price (in dollars per share) | $ 0.36 |  |  |
Interest expense |  | $ 300 | 100 |
Effective interest rate |  | 22.50% |  |
Debt outstanding |  |  | 2,332 |
Debt, net of discounts and costs |  | $ 2,000 |  |
Maximum Monthly Redemption Amount | $ 350 |  |  |
Lowest closing bid, percentage | 85.00% |  |  |
Outstanding principal and accrued interest |  | 0 | $ 2,300 |
Redemption price floor, per share | $ 0.11 |  |  |
Maximum redemption amount honored | $ 150 |  |  |
Redemption conversion price | $ 0.06 |  |  |
Debt issuance, liability component | $ 1,900 |  |  |
Debt issuance, equity component | $ 200 |  |  |
Iliad Note [Member] |  |  |  |
Long-term debt |  |  |  |
Additional conversion of principal and accrued interest |  | $ 1,900 |  |
Additional conversion of shares |  | 7,778,270 |  |
Outstanding principal and accrued interest |  | $ 0 |  |
Conversion of principal and accrued interest |  | $ 500 |  |
Conversion of shares |  | 1,388,890 |  |

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- Definition The additional number of shares issued in exchange for the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or payments in the period. + References No definition available. + Details
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