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Leases - Schedule of Operating Lease Right-of-use Assets and Liabilities (Details) - USD ($)
$ in Thousands
 12 Months Ended
Jan. 02, 2019
Dec. 31, 2019
Leases [Abstract]    
Initial measurement at January 1, 2019 $ 3,458  
Less tenant improvement allowance (1,122)  
Net right-of-use assets at January 1, 2019 2,336 $ 2,336
Initial measurement of new operating lease right-of-use-assets   57
Less amortization of operating lease right-of-use assets   (292)
Operating lease right-of-use assets 2,336 2,101
Initial measurement at January 1, 2019   3,458
Initial measurement of new operating lease liabilities   57
Less principal payments on operating lease liabilities   (215)
Operating lease liabilities at December 31, 2019 $ 3,458 3,300
Less non-current portion   (2,891)
Current portion at December 31, 2019   $ 409