Quarterly report pursuant to Section 13 or 15(d)

Series A Preferred Stock; Exchange for Shares of Series A-1 Preferred Stock - Additional Information (Details)

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Series A Preferred Stock; Exchange for Shares of Series A-1 Preferred Stock - Additional Information (Details) - USD ($)
$ in Thousands
9 Months Ended
Aug. 18, 2017
Sep. 28, 2019
Series A-1 Convertible Preferred Stock    
Number of shares issued upon exchange of Convertible Preferred Stock   259,729
Convertible preferred stock conversion ratio   20.00%
Number of shares issued upon conversion of Convertible Preferred Stock   20
Issuance of number of common stock shares related to conversion   19.90%
GeoTraq Inc.    
Cash paid for acquisition $ 200  
GeoTraq Inc. | One-year Unsecured Promissory Notes    
Business acquisition, Promissory notes issued $ 800  
GeoTraq Inc. | Series A Convertible Preferred Stock    
Business acquisition, Stock issued 288,588