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Leases (Details Narrative)
$ in Thousands
 3 Months Ended
Jan. 02, 2019
USD ($)
ft²
Mar. 31, 2019
USD ($)
Mar. 31, 2018
USD ($)
Dec. 31, 2018
USD ($)
Lease term description   The Company has elected to not recognize right-of-use assets and lease liabilities arising from short-term leases, which are leases that, at the commencement date, have a lease term of 12 months or less and do not include an option to purchase the underlying asset that the lessee is reasonably certain to exercise.    
Operating lease percentage   6.36%    
Operating weighted average remaining term   12 years 18 days    
Operating lease right use of assets $ 6,325 $ 6,195  
Decrease in accounts payable and accrued expenses 388 158 $ 106  
Operating lease liability $ 6,712 6,594  
Cash paid in operating lease liability   223    
Operating lease expense   234    
Debt discount amortization   10    
Depreciation expenses   73    
Cash paid for interest expenses   $ 11    
Finance Leases [Member]        
Operating lease percentage   9.82%    
Operating weighted average remaining term   9 months 25 days    
San Diego [Member]        
Operating lease space | ft² 10,200      
Operating lease expires date Dec. 31, 2021      
Lease term 5 years      
Irvine [Member]        
Operating lease space | ft² 4,500      
Operating lease expires date Dec. 31, 2020      
Irvine [Member] | Minimum [Member]        
Lease term 2 years      
Irvine [Member] | Maximum [Member]        
Lease term 5 years      
Ledgewood [Member]        
Operating lease space | ft² 25,000      
Operating lease expires date Jul. 31, 2024      
Ledgewood [Member] | Minimum [Member]        
Lease term 2 years      
Ledgewood [Member] | Maximum [Member]        
Lease term 5 years