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Commitments and Contingencies (Details Textual)
ft² in Thousands
1 Months Ended
Oct. 31, 2016
USD ($)
ft²
Jul. 31, 2015
USD ($)
Jun. 30, 2015
USD ($)
Mar. 31, 2014
USD ($)
Mar. 31, 2017
USD ($)
Loss Contingencies [Line Items]          
Tenant improvements         $ 933,000
Plymouth Meeting, Pennsylvania [Member]          
Loss Contingencies [Line Items]          
Initial lease term       11 years 6 months  
Security deposit       $ 49,000  
Increase to monthly payment   $ 16,000      
San Diego, California [Member]          
Loss Contingencies [Line Items]          
Area leased (in square feet) | ft² 51        
Initial lease term 10 years        
Adjustable rent period 2 years        
Security deposit $ 95,000        
Tenant improvements         1,500,000
Minimum [Member] | Plymouth Meeting, Pennsylvania [Member]          
Loss Contingencies [Line Items]          
Monthly payments under the lease       0  
Minimum [Member] | San Diego, California [Member]          
Loss Contingencies [Line Items]          
Monthly payments under the lease 0        
Minimum [Member] | San Diego Office [Member]          
Loss Contingencies [Line Items]          
Tenant improvements         $ 822,000
Increase to monthly payment     $ 13,000    
Maximum [Member] | Plymouth Meeting, Pennsylvania [Member]          
Loss Contingencies [Line Items]          
Monthly payments under the lease       $ 58,000  
Maximum [Member] | San Diego, California [Member]          
Loss Contingencies [Line Items]          
Monthly payments under the lease $ 95,000