XML 54 R41.htm IDEA: XBRL DOCUMENT v3.8.0.1
Commitments and Contingencies (Narrative) (Details)
$ in Thousands
3 Months Ended
Jan. 06, 2017
USD ($)
Dec. 31, 2017
USD ($)
building
Dec. 31, 2016
USD ($)
Sep. 30, 2017
USD ($)
building
Loss Contingencies [Line Items]        
Rent expense   $ 300 $ 300  
Fair value assumptions, credit adjusted risk-free rate, range minimal amount   1.20%    
Fair value assumptions, credit adjusted risk-free rate, range maximum amount   4.20%    
Accretion expense   $ 17 17  
Settled Litigation [Member] | Mirasol Class Action [Member]        
Loss Contingencies [Line Items]        
Litigation settlement, awarded to other party $ 300      
Settlement agreement   $ 300    
Provision accrual     $ 200  
Settled Litigation [Member] | Mirasol Wrongful Termination [Member]        
Loss Contingencies [Line Items]        
Litigation settlement, awarded to other party $ 50      
Buildings [Member] | Property Subject to Operating Lease [Member]        
Loss Contingencies [Line Items]        
Number of leased buildings | building   6    
Leases retroactively effective | building       4
Lease term (in years)   3 years    
Operating lease, term extension, option to extend (in years)   3 years    
Property in Alhambra, California [Member]        
Loss Contingencies [Line Items]        
Asset retirement obligation   $ 1,700   $ 1,600