Annual report pursuant to Section 13 and 15(d)

Stockholder's Equity (Details 1)

v3.19.1
Stockholder's Equity (Details 1) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]    
Outstanding beginning 1,803,094 125,730
Granted 812,000 2,020,769
Exercised (15,294) (1,438)
Forfeited/canceled (79,701) (341,967)
Outstanding ending 2,520,101 1,803,094
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]    
Outstanding beginning $ 4.41 $ 2.43
Granted 4.16 4.51
Exercised 3.31 2.38
Outstanding ending $ 4.32 $ 4.41
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Life [Roll Forward]    
Outstanding beginning 8 years 10 months 10 days 7 years 10 months 13 days
Outstanding ending 8 years 8 months 19 days 8 years 10 months 10 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Aggregate Intrinsic Value [Roll Forward]    
Outstanding beginning $ 421 $ 204
Exercised 6  
Outstanding ending $ 421