Quarterly report pursuant to Section 13 or 15(d)

Intangible Assets - Additional Information (Details)

v3.19.3
Intangible Assets - Additional Information (Details) - USD ($)
3 Months Ended 9 Months Ended
Aug. 18, 2017
Sep. 28, 2019
Sep. 29, 2018
Sep. 28, 2019
Sep. 29, 2018
Finite Lived Intangible Assets [Line Items]          
Intangible amortization expense   $ 934,000 $ 933,000 $ 2,800,000 $ 2,797,000
GeoTraq Inc.          
Finite Lived Intangible Assets [Line Items]          
Estimated useful life of intangible assets       7 years  
Total consideration transferred $ 26,097,000        
Cash paid for acquisition 200,000        
Additional intangible assets recorded 10,134,000        
Offsetting deferred tax liability 10,134,000        
Business combination, other assets acquired 0        
Business combination, other Liabilities assumed $ 0        
GeoTraq Inc. | Series A1 Preferred Stock          
Finite Lived Intangible Assets [Line Items]          
Stock issued in acquisition 288,588        
Fair value of stock issued $ 14,963,000        
GeoTraq Inc. | Unsecured Promissory Notes          
Finite Lived Intangible Assets [Line Items]          
Promissory notes annual interest rate 1.29%        
Promissory notes maturity date Aug. 18, 2018        
Promissory notes issued $ 800,000