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21. Shareholders' Equity (Details Narrative) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Mar. 30, 2019 | Mar. 31, 2018 | Dec. 29, 2018 | Dec. 30, 2017
Common Stock, issued shares (in shares) | 1,695 |  | 1,695 |
Common Stock, outstanding shares (in shares) | 1,695 |  | 1,695 |
Options outstanding | 101 |  | 101 | 125
Share based compensation expense | $ 0 | $ 0 |  |
Aggregate intrinsic value per share outstanding | $ 2.20 |  |  |
Warrants outstanding | 33 |  | 33 |
Warrant exercise price | $ 3.40 |  | $ 3.40 |
Warrant expiration date |  | May 31, 2020 |  |
Series A Preferred Stock [Member] |  |  |  |
Stock issued, Shares |  |  | 288,588 |
2016 Plan [Member] |  |  |  |
Options authorized for issuance |  |  | 400 |
Options outstanding | 4 |  | 4 |
2011 Plan [Member] |  |  |  |
Options outstanding | 97 |  | 97 |
Energy Efficiency Investments [Member] |  |  |  |
Warrants issued |  |  | 33 |
Fair value of warrants issued |  |  | $ 106 |

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