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v3.19.1

Reverse Stock Split (Details) | May 19, 2016 shares | Dec. 29, 2018 shares | Dec. 30, 2017 shares | May 18, 2016 shares
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Class of Stock [Line Items] |  |  |  |
Common stock, shares authorized | 20,000,000 | 20,000,000 | 20,000,000 | 200,000,000
Preferred stock, shares authorized | 30,000,000 |  |  |
Common Stock |  |  |  |
Class of Stock [Line Items] |  |  |  |
Stock split, conversion ratio | 0.1 |  |  |

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