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
Jul. 19, 2018
Jan. 12, 2018
Mar. 31, 2019
Dec. 31, 2018
Oct. 21, 2016
Debt Disclosure [Abstract]          
Gain on contract termination     $ 21    
Sublease income     38    
Lease contract termination liability       $ 218  
Debt Instrument [Line Items]          
Credit agreement     $ 4,000 $ 4,000  
Interest rate     9.50%    
ESW Holdings, Inc.          
Debt Instrument [Line Items]          
Credit agreement   $ 10,000      
Principal payment $ 6,000        
Variable rate   4.00%      
Debt, fair value     $ 3,600    
Hale Capital, LLP          
Debt Instrument [Line Items]          
Credit agreement         $ 8,000
Prepayment fee   10.00%