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Stockholders' Equity and Stock-Based Compensation (Stock-Based Compensation) (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2016 | Dec. 26, 2015 | Dec. 28, 2013
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |
Stock-based compensation | $ 2,425,326 | $ 3,145,479 | $ 4,827,772
Cost of component revenues |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |
Stock-based compensation | 561,791 | 729,715 | 766,221
Research and development |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |
Stock-based compensation | 527,081 | 776,946 | 965,945
Selling, general and administrative |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |
Stock-based compensation | $ 1,336,454 | $ 1,638,818 | $ 3,095,606

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