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Financing Obligations - Schedule of Obligations (Details) - USD ($)
$ in Thousands
Apr. 01, 2018
Dec. 31, 2017
Debt and capital lease obligations:    
Revolving line of credit $ 6,000 $ 6,000
Capital leases 531 654
Debt and capital lease obligations 6,531 6,654
Less: Current portion of debt and capital lease obligations (6,296) (6,299)
Long-term portion of debt and capital lease obligations $ 235 $ 355