Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity (Details 3)

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Stockholders' Equity (Details 3) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Share-based Compensation $ 4,960 $ 2,012
Employee [Member]    
Share-based Compensation 3,664 1,486
Non-employee    
Share-based Compensation $ 1,296 $ 526