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 6 Months Ended
May 31, 2018
USD ($)
Jun. 30, 2018
USD ($)
Sep. 30, 2018
USD ($)
Sep. 30, 2017
USD ($)
Sep. 30, 2018
USD ($)
agreement
Sep. 30, 2017
USD ($)
Mar. 31, 2018
USD ($)
Revolving Credit Facility              
Interest expense     $ 186,000 $ 98,000 $ 304,000 $ 319,000  
Amortization of deferred financing costs         $ 85,000 133,000  
Borrowing rate (as a percent)     6.30%   6.30%    
Outstanding borrowings     $ 12,496,000   $ 12,496,000   $ 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     200,000 100,000 300,000 200,000  
Amortization of deferred financing costs     46,900 $ 28,000 100,000 $ 46,000  
Variable base rate prime rate            
Outstanding borrowings     12,500,000   12,500,000    
Restricted cash equivalents for credit facility     6,000,000   6,000,000    
Origination fees     400,000   400,000    
Amount available for additional borrowing     $ 2,500,000   $ 2,500,000    
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          
Restricted cash   $ 6,000,000          
Facility fee percentage   0.50%          
Cash collateral percentage   40.00%          
Fee for early termination   $ 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%