Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Significant Accounting Policies (Details Textual)

v3.20.1
Significant Accounting Policies (Details Textual) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Significant Accounting Policies (Textual)      
Cash payment for operating lease liabilities $ 3,458    
Research and development expenses $ 28 $ 327 $ 584
Warrants exercisable 3,536,495 2,299,684 1,584,071
Transaction price $ 5,000    
Reimbursement cost 1,000    
ROU Assets [Member]      
Significant Accounting Policies (Textual)      
Cash payment for operating lease liabilities $ 3,458