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Redeemable Financial Instruments (Narrative) (Details) - USD ($) $ in Thousands |  | 9 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Sep. 29, 2017 | Sep. 30, 2018 | Dec. 31, 2017 | Jan. 31, 2017 | Oct. 03, 2016
Related Party Transaction [Line Items] |  |  |  |  |
Redeemable financial instrument |  | $ 16,732 | $ 16,732 |  |
DGC Family Fintech Trust/CBF [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Redeemable financial instrument | $ 10,000 | 10,000 | 10,000 |  |
Due to investors, annual return on investment | 3.20% |  |  |  |
Due to investors, additional return on investment | 15.00% |  |  |  |
Investment agreement, upon termination, period in which payment to investors must occur | 30 days |  |  |  |
Due to investors, upon termination of investment agreement, return on investment amount | 15.00% |  |  |  |
JKD Investor [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Redeemable financial instrument |  | $ 6,732 | $ 6,732 | $ 1,000 | $ 6,000
Due to investors, annual return on investment |  |  |  |  | 50.00%
DGC Family Fintech Trust/CBF And JKD Capital Partners I, LTD [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Investment agreement, written notice period for termination | 90 days |  |  |  |
Investment agreement, after termination deadline, notice period for additional payment equal to Investment Balance plus an amount equal to any accrued by unpaid investment return | 60 days |  |  |  |
JVB's [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Potential percent of consideration owed to investor on qualified sale |  | 25.00% |  |  |
Investment Agreement, Before Third Anniversary, Greater Than $5,333 But Less Than Or Equal To $8,000 [Member] | DGC Family Fintech Trust/CBF [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Investment agreement, due to investors | $ 800 |  |  |  |
Investment Agreement, Before Third Anniversary, Greater Than $8,000 [Member] | DGC Family Fintech Trust/CBF [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Due to investors, annual return on investment | 10.00% |  |  |  |
Investment Agreement, Following Third Anniversary, Revenue Of Business Greater Than Zero, The Greater Of 20% Investment Amount, Or 20% Of Revenue Of Business Or Any Annual Period Which Revenue Of Business Is Zero Or Less Than Zero [Member] | DGC Family Fintech Trust/CBF [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Due to investors, annual return on investment | 3.20% |  |  |  |
Investment terms, range on investment amount for annual return on investment | 20.00% |  |  |  |
Investment terms, range on revenue of business for annual return on investment | 20.00% |  |  |  |
Maximum [Member] | JKD Investor [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Redeemable financial instrument |  |  |  |  | $ 12,000
Maximum [Member] | Investment Agreement, Before Third Anniversary, Greater Than Zero But Less Than Or Equal To $5,333 [Member] | DGC Family Fintech Trust/CBF [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Investment terms, annual period revenue range for additional return on investment | $ 5,333 |  |  |  |
Maximum [Member] | Investment Agreement, Before Third Anniversary, Greater Than $5,333 But Less Than Or Equal To $8,000 [Member] | DGC Family Fintech Trust/CBF [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Investment terms, annual period revenue range for additional return on investment | 8,000 |  |  |  |
Minimum [Member] | Investment Agreement, Before Third Anniversary, Greater Than $5,333 But Less Than Or Equal To $8,000 [Member] | DGC Family Fintech Trust/CBF [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Investment terms, annual period revenue range for additional return on investment | 5,333 |  |  |  |
Minimum [Member] | Investment Agreement, Before Third Anniversary, Greater Than $8,000 [Member] | DGC Family Fintech Trust/CBF [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Investment terms, annual period revenue range for additional return on investment | $ 8,000 |  |  |  |

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