Quarterly report pursuant to Section 13 or 15(d)

Revolving Credit Facility (Details)

v3.8.0.1
Revolving Credit Facility (Details)
 3 Months Ended 6 Months Ended
Jun. 02, 2017
USD ($)
agreement
Sep. 30, 2017
USD ($)
Sep. 30, 2016
USD ($)
Sep. 30, 2017
USD ($)
agreement
Sep. 30, 2016
USD ($)
Mar. 31, 2017
USD ($)
Revolving Credit Facility            
Outstanding borrowings   $ 9,575,000   $ 9,575,000   $ 11,533,000
Interest expense   $ 98,000 $ 129,000 319,000 $ 263,000  
Amortization of deferred financing costs       $ 133,000 86,000  
Borrowing rate (as a percent)   5.80%   5.80%   4.90%
Wells Fargo            
Revolving Credit Facility            
Number of credit and security agreements | agreement       2    
Bridge Bank            
Revolving Credit Facility            
Number of secured credit facilities | agreement 2          
Term of credit agreements 2 years          
Maximum borrowings as a percent of cash held 85.00%          
Credit Facility | Wells Fargo            
Revolving Credit Facility            
Maximum borrowing capacity under facility   $ 20,000,000   $ 20,000,000    
Outstanding borrowings   6,200,000   6,200,000   $ 11,500,000
Interest expense     100,000 200,000 300,000  
Amortization of deferred financing costs     $ 42,000 100,000 $ 100,000  
Credit Facility | Bridge Bank            
Revolving Credit Facility            
Maximum borrowing capacity under facility $ 12,000,000          
Outstanding borrowings   9,600,000   9,600,000    
Interest expense   100,000   200,000    
Amortization of deferred financing costs   $ 28,000   $ 46,000    
Restricted cash equivalents for credit facility 5,000,000          
Origination fees $ 200,000          
Credit Facility | Bridge Bank | Prime Rate            
Revolving Credit Facility            
Variable base rate prime rate          
Interest margin on variable rate 1.50%