Annual report pursuant to Section 13 and 15(d)

Revolving Credit Facility (Details)

v3.4.0.3
Revolving Credit Facility (Details)
 12 Months Ended
Sep. 30, 2017
agreement
Sep. 01, 2017
agreement
Mar. 31, 2016
USD ($)
agreement
Mar. 31, 2015
USD ($)
Mar. 31, 2014
USD ($)
Jun. 10, 2015
USD ($)
Jun. 09, 2014
USD ($)
Revolving Credit Facility              
Restricted cash     $ 5,002,000        
Outstanding borrowings     9,459,000 $ 12,953,000      
Interest expense     640,000 548,000 $ 712,000    
Amortization of deferred financing costs     $ 172,000 $ 196,000 223,000    
Credit Facility              
Revolving Credit Facility              
Number of credit and security agreements | agreement     2        
Maximum borrowing capacity under facility     $ 20,000,000        
Previous maximum line of credit     15,000,000        
Minimum cash balance     $ 8,100,000        
Restricted cash           $ 5,000,000  
Minimum covenant compliance period     12 months        
Variable base rate     LIBOR        
Borrowing rate (as a percent)     4.40% 4.00%      
Annual unused line fee (as a percent)     0.25%        
Interest rate with respect to letters of credit (as a percent)     1.50%        
Outstanding borrowings     $ 9,500,000 $ 13,000,000      
Additional borrowing capacity under facility     9,000,000        
Interest expense     500,000 700,000 700,000    
Amortization of deferred financing costs     200,000 $ 200,000 $ 100,000    
Credit Facility | Forecast              
Revolving Credit Facility              
Number of credit and security agreements set to expire | agreement 1 1          
Credit Facility | Minimum              
Revolving Credit Facility              
Interest floor amount     $ 66,000        
Non-revolving capital expenditure line of credit              
Revolving Credit Facility              
Maximum borrowing capacity under facility             $ 500,000