Quarterly report pursuant to Section 13 or 15(d)

Revolving Credit Facility (Details)

v3.10.0.1
Revolving Credit Facility (Details)
1 Months Ended 3 Months Ended
May 31, 2018
USD ($)
Jun. 30, 2018
USD ($)
Jun. 30, 2018
USD ($)
agreement
Jun. 30, 2017
USD ($)
Mar. 31, 2018
USD ($)
Revolving Credit Facility          
Interest expense     $ 118,000 $ 221,000  
Amortization of deferred financing costs     38,000 105,000  
Restricted cash   $ 6,000,000 $ 6,000,000   $ 5,000,000
Borrowing rate (as a percent)   6.00% 6.00%    
Outstanding borrowings   $ 10,024,000 $ 10,024,000   $ 8,527,000
Wells Fargo          
Revolving Credit Facility          
Number of credit and security agreements | agreement     2    
Bridge Bank          
Revolving Credit Facility          
Maximum borrowings as a percent of cash held   85.00% 85.00%    
Credit Facility | Wells Fargo          
Revolving Credit Facility          
Maximum borrowing capacity under facility   $ 20,000,000 $ 20,000,000    
Interest expense       200,000  
Amortization of deferred financing costs       100,000  
Credit Facility | Bridge Bank          
Revolving Credit Facility          
Maximum borrowing capacity under facility $ 12,000,000 15,000,000 15,000,000    
Interest expense     100,000 58,800  
Amortization of deferred financing costs     38,500 $ 18,000  
Variable base rate prime rate        
Outstanding borrowings   10,000,000 10,000,000    
Restricted cash equivalents for credit facility   6,000,000 6,000,000    
Origination fees   400,000 400,000    
Amount available for additional borrowing   $ 5,000,000 5,000,000    
Facility fee percentage 0.625%        
Cash collateral percentage 42.00%        
Credit Facility | Bridge Bank | Prime Rate          
Revolving Credit Facility          
Variable base rate   prime rate      
Interest margin on variable rate 1.50% 1.00%      
Letter Agreement | Bridge Bank          
Revolving Credit Facility          
Maximum borrowing capacity under facility   $ 15,000,000 15,000,000    
Restricted cash   $ 6,000,000 $ 6,000,000    
Facility fee percentage   0.50% 0.50%    
Cash collateral percentage   40.00% 40.00%    
Fee for early termination   $ 0 $ 0    
Letter Agreement | Bridge Bank | Prime Rate          
Revolving Credit Facility          
Interest margin on variable rate   1.00%      
Domestic Facility | Bridge Bank          
Revolving Credit Facility          
Maximum line of credit advances as a percentage of unrestricted cash and cash collateral   85.00% 85.00%