Annual report pursuant to Section 13 and 15(d)

Balance Sheet Detail (Details)

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Balance Sheet Detail (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2017
Equipment and leasehold improvements    
Equipment and leasehold improvements, Gross $ 2,955 $ 3,323
Less accumulated depreciation and amortization (1,018) (1,495)
Equipment and leasehold improvements, Net 1,937 1,828
Written off equipment and leasehold improvements 2,400  
Equipment    
Equipment and leasehold improvements    
Equipment and leasehold improvements, Gross 1,638 1,988
Leasehold improvements    
Equipment and leasehold improvements    
Equipment and leasehold improvements, Gross $ 1,317 $ 1,335