Annual report pursuant to Section 13 and 15(d)

Consolidated Statements of Stockholders' Equity (Parenthetical)

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Consolidated Statements of Stockholders' Equity (Parenthetical) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Statement of Stockholders' Equity [Abstract]    
Underwriting discount and issuance costs   $ 662
Issuance costs   $ 227
Commission and issuance costs $ 274