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Debt - Schedule of Outstanding Long-Term Debt (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Jan. 03, 2018 | Dec. 31, 2017
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Debt Instrument [Line Items] |  |  |
Total debt, Outstanding Principle |  |  | $ 3,105
Total debt, Unamortized Discount and Debt Issuance Costs |  |  | (144)
Total debt, Net Carrying Amount |  |  | 2,961
Less: Current portion, Outstanding Principle |  |  | (3,105)
Less: Current portion, Unamortized Discount and Debt Issuance Costs |  |  | 144
Less: Current portion, Net Carrying Amount |  |  | (605)
Long-term debt, Outstanding Principle |  |  |
Long-term debt, Unamortized Discount and Debt Issuance Costs |  |  |
Long-term debt, Net Carrying Amount |  |  |
Hercules Term Loan [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Total debt, Outstanding Principle |  | $ 2,300 | 605
Total debt, Unamortized Discount and Debt Issuance Costs |  |  |
Total debt, Net Carrying Amount |  |  | 605
North Stadium Term Loan [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Total debt, Outstanding Principle |  |  | 2,500
Total debt, Unamortized Discount and Debt Issuance Costs |  |  | (144)
Total debt, Net Carrying Amount |  |  | $ 2,356

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