Quarterly report pursuant to Section 13 or 15(d)

Debt - Additional Information (Detail)

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Debt - Additional Information (Detail)
1 Months Ended 3 Months Ended 12 Months Ended
Dec. 21, 2017
Jun. 24, 2013
USD ($)
Installment
Jun. 30, 2018
USD ($)
Jun. 30, 2017
USD ($)
Jun. 30, 2016
USD ($)
Mar. 31, 2018
USD ($)
Installment
Mar. 31, 2017
USD ($)
Dec. 31, 2017
USD ($)
Jun. 30, 2015
USD ($)
Debt Instrument [Line Items]                  
Interest expense including amortization of deferred financing fees           $ 16,000 $ 34,000    
Promissory Note | Jamison                  
Debt Instrument [Line Items]                  
Variable rate notes issued for redemption of partners' interests, spread           5.00%      
Debt instrument variable interest rate basis           The principal amount outstanding under the notes bears interest at 5% per annum.      
Aggregate principal amount                 $ 2,165,000
Principal amount payment terms           The principal amounts of the notes are payable in three equal installments of approximately $722 on each of June 30, 2016, 2017 and 2018.      
Number of installments | Installment           3      
Installment amount payable       $ 722,000 $ 722,000        
Principal amount of notes outstanding           $ 722,000   $ 722,000  
Accrued, unpaid interest           27,000   18,000  
Scenario Forecast | Promissory Note | Jamison                  
Debt Instrument [Line Items]                  
Installment amount payable     $ 722,000            
City National Bank                  
Debt Instrument [Line Items]                  
Credit facility, borrowing capacity   $ 15,000,000              
Credit facility, proceeds from borrowings           0   0  
Borrowings under revolving credit facility           0   $ 0  
Interest expense including amortization of deferred financing fees           $ 4,000 $ 4,000    
Delayed Draw Term Loan | City National Bank                  
Debt Instrument [Line Items]                  
Credit facility, borrowing capacity   $ 7,500,000              
Credit facility maturity date           Jun. 24, 2020      
Credit facility, interest rate description           The higher of the prime rate plus a margin of 0.05 percentage points and 2.5% or (b) the LIBOR rate plus 3 percentage points, at the borrowers’ option.      
Variable rate notes issued for redemption of partners' interests, spread   3.00%              
Debt instrument variable interest rate basis           LIBOR      
Credit facility, number of installments | Installment   20              
Credit facility, frequency of installments           Quarterly      
Delayed Draw Term Loan | City National Bank | Maximum                  
Debt Instrument [Line Items]                  
Variable rate notes issued for redemption of partners' interests, spread   0.05%              
Debt instrument variable interest rate basis           Prime rate      
Delayed Draw Term Loan | City National Bank | Minimum                  
Debt Instrument [Line Items]                  
Credit facility, fixed interest rate   2.50%              
Borrowings Under Revolving Credit Agreement                  
Debt Instrument [Line Items]                  
Line of credit facility extended term 1 year                
Borrowings Under Revolving Credit Agreement | City National Bank                  
Debt Instrument [Line Items]                  
Credit facility, borrowing capacity   $ 7,500,000              
Credit facility maturity date           Dec. 23, 2017      
Debt covenant, restriction on change in control   30.00%