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v3.20.1

Stockholders' Equity (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands |  |  |  |  |  | 12 Months Ended |
--- | --- | --- | --- | --- | --- | --- | ---
Sep. 12, 2018 | Aug. 29, 2018 | May 17, 2018 | Nov. 14, 2017 | Apr. 17, 2017 | Dec. 28, 2019 | Dec. 29, 2018 | Aug. 15, 2018
Serial Preferred Stock |  |  |  |  |  |  |  |
Preferred Stock, Shares Authorized |  |  |  |  |  | 10,000,000 | 10,000,000 |
Preferred Stock, Par or Stated Value Per Share |  |  |  |  |  | $ 0.001 | $ 0.001 |
Preferred Stock, Shares Outstanding |  |  |  |  |  | 0 | 0 |
Number of Rights Authorized for Each Outstanding Share of Stock |  |  |  |  | 1 |  |  |
Number of Shares Issued when Right is Exercised |  |  |  |  | 0.001 |  |  |
Purchase price per share |  |  | $ 0.148 |  | $ 6.56 |  |  |
Number of Days Rights are to be Distributed |  |  |  |  | 10 days |  |  |
Minimum Beneficial Ownership Percentage for Rights to be Distributed |  |  |  |  | 15.00% |  |  |
Common Stock |  |  |  |  |  |  |  |
Common stock, par value |  |  | $ 0.001 |  |  | $ 0.001 | $ 0.001 |
Common stock, shares authorized |  |  |  |  |  | 300,000,000 | 300,000,000 | 150,000,000
Shares issued |  |  | 5,405,405 |  |  |  | 31,786,146 |
Proceeds from issuance of common stock |  |  | $ 800 |  |  | $ 6,352 | $ 15,762 |
Exercise price of warrants |  |  |  |  |  | $ 0.62 |  |
Stock-Based Compensation |  |  |  |  |  |  |  |
Shares available for issuance |  |  |  |  |  | 1,101,572 |  |
Series A Preferred Stock |  |  |  |  |  |  |  |
Serial Preferred Stock |  |  |  |  |  |  |  |
Preferred Stock, Shares Authorized |  |  |  |  |  | 1,000,000 | 1,000,000 |
Preferred Stock, Par or Stated Value Per Share |  |  |  |  |  | $ 0.001 | $ 0.001 |
Stock-Based Compensation |  |  |  |  |  |  |  |
Shares available for issuance |  |  |  |  | 1,000,000 |  |  |
ATM Program |  |  |  |  |  |  |  |
Common Stock |  |  |  |  |  |  |  |
Shares issued |  | 40,680,368 |  |  |  |  |  |
Proceeds from issuance of common stock |  | $ 8,600 |  |  |  |  |  |
Aggregate gross proceeds agent can sell shares of stock |  |  |  | $ 9,000 |  |  |  |
Common Stock |  |  |  |  |  |  |  |
Common Stock |  |  |  |  |  |  |  |
Shares issued |  |  |  |  |  |  | 59,414,000 |
Proceeds from issuance of common stock |  |  |  |  |  |  | $ 5,800 |
Securities purchase agreement |  |  |  |  |  |  |  |
Serial Preferred Stock |  |  |  |  |  |  |  |
Purchase price per share | $ 0.45 |  |  |  |  |  |  |
Common Stock |  |  |  |  |  |  |  |
Shares issued | 22,222,220 |  |  |  |  |  |  |
Proceeds from issuance of common stock | $ 9,200 |  |  |  |  |  |  |
Warrants issued to purchase additional shares | 11,111,110 |  |  |  |  |  |  |
Number of days until warrants are exercisable | 181 days |  |  |  |  |  |  |
Term of warrants | 5 years |  |  |  |  |  |  |
Exercise price of warrants | $ 0.655 |  |  |  |  |  |  |

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