Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies Narrative (Details)

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Commitments and Contingencies Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Jul. 19, 2018
Jul. 06, 2018
Jan. 12, 2018
Jan. 12, 2018
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Dec. 31, 2017
Oct. 21, 2016
Debt Instrument [Line Items]                    
Term loan, at face value         $ 4,000   $ 4,000   $ 8,000  
Accrued prepayment fee     $ 800 $ 800            
Loss on extinguishment of debt         1,189 $ 0 1,189 $ 0    
ESW Holdings, Inc.                    
Debt Instrument [Line Items]                    
Term loan, at face value     10,000 $ 10,000            
Debt instrument, periodic payment $ 6,500                  
Debt instrument, periodic payment, principal 6,000                  
Debt instrument, periodic payment, interest $ 463                  
Loss on extinguishment of debt         (1,189)          
Debt instrument, basis spread on variable rate       4.00%            
Long-term debt, fair value         $ 3,400   $ 3,400      
Hale Capital, LLP                    
Debt Instrument [Line Items]                    
Term loan, at face value     $ 8,000 $ 8,000           $ 8,000
Debt instrument, basis spread on variable rate     6.00%              
Debt instrument, prepayment fee, percentage       10.00%            
Payment for debt extinguishment, including prepayment fee       $ 8,800            
BriefCam, Canon Inc                    
Debt Instrument [Line Items]                    
Sale of investment, consideration transferred, net of estimated tax   $ 9,600