Annual report pursuant to Section 13 and 15(d)

Revolving Credit Facility (Details)

v3.7.0.1
Revolving Credit Facility (Details)
 12 Months Ended
Jun. 02, 2017
USD ($)
item
Jun. 10, 2015
USD ($)
item
Mar. 31, 2017
USD ($)
agreement
Mar. 31, 2016
USD ($)
Jun. 30, 2015
USD ($)
Jun. 29, 2015
USD ($)
Revolving Credit Facility            
Restricted cash     $ 5,514,000 $ 5,002,000    
Outstanding borrowings     11,533,000 9,459,000    
Interest expense     536,000 640,000    
Amortization of deferred financing costs     $ 173,000 $ 172,000    
Wells Fargo            
Revolving Credit Facility            
Number of credit and security agreements | agreement     2      
Bridge Bank            
Revolving Credit Facility            
Number of secured credit facilities | item 2          
Term of credit agreements 2 years          
Maximum borrowings as a percent of cash held 85.00%          
Bridge Bank | Prime Rate            
Revolving Credit Facility            
Variable base rate prime rate          
Interest margin on variable rate 1.50%          
Credit Facility | Wells Fargo            
Revolving Credit Facility            
Maximum borrowing capacity under facility     $ 20,000,000   $ 20,000,000 $ 15,000,000
Minimum cash balance     $ 9,800,000      
Number of noncompliance events waived | item   1        
Restricted cash   $ 5,000,000        
Variable base rate     Daily three month LIBOR      
Borrowing rate (as a percent)     4.90% 4.40%    
Annual unused line fee (as a percent)     0.25%      
Interest rate with respect to letters of credit (as a percent)     1.50%      
Outstanding borrowings     $ 11,500,000 $ 9,500,000    
Additional borrowing capacity under facility     6,800,000      
Interest expense     500,000 $ 500,000    
Amortization of deferred financing costs     200,000      
Credit Facility | Bridge Bank            
Revolving Credit Facility            
Maximum borrowing capacity under facility $ 12,000,000          
Restricted cash equivalents for credit facility $ 5,000,000          
Credit Facility | Minimum | Wells Fargo            
Revolving Credit Facility            
Interest floor amount     66,000      
Non-revolving capital expenditure line of credit | Wells Fargo            
Revolving Credit Facility            
Maximum borrowing capacity under facility     $ 500,000