Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies Term Loan (Details)

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Commitments and Contingencies Term Loan (Details) - USD ($)
$ in Thousands
12 Months Ended
Nov. 12, 2019
Jul. 19, 2018
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Jan. 12, 2018
Class of Warrant or Right [Line Items]            
Warrant shares (in shares)     1,239,286      
Proceeds from sale of BriefCam, Ltd.     $ 41 $ 9,778 $ 0  
Term loan, at face value     0 4,000    
Unamortized original issue discount     0 (481)    
Unamortized debt issuance costs     0 (88)    
Term loan     $ 0 $ 3,431    
ESW Holdings, Inc.            
Class of Warrant or Right [Line Items]            
Warrant shares (in shares)           925,000
ESW Holdings, Inc.            
Class of Warrant or Right [Line Items]            
Debt Instrument, Periodic Payment $ 4,800 $ 6,500        
Periodic payment, principal 4,000 6,000        
Debt Instrument, Periodic Payment, Interest $ 528 463        
Term loan, at face value           $ 10,000
BriefCam, Canon Inc            
Class of Warrant or Right [Line Items]            
Proceeds from sale of BriefCam, Ltd.   $ 9,800