Quarterly report pursuant to Section 13 or 15(d)

Debt - Additional Information (Detail)

v3.19.2
Debt - Additional Information (Detail)
3 Months Ended 6 Months Ended 12 Months Ended
Jul. 01, 2019
USD ($)
Jun. 20, 2019
Jun. 24, 2013
USD ($)
Installment
Jun. 30, 2019
USD ($)
Jun. 30, 2018
USD ($)
Jun. 30, 2019
USD ($)
Jun. 30, 2018
USD ($)
Dec. 31, 2018
USD ($)
Debt Instrument [Line Items]                
Interest expense including amortization of deferred financing fees       $ 8,000 $ 13,000 $ 16,000 $ 29,000  
City National Bank                
Debt Instrument [Line Items]                
Credit facility, borrowing capacity     $ 15,000,000          
Credit facility, interest rate description           The Base Rate Margin and LIBOR Rate Margin were each decreased by 0.25 percentage points to 0.25 percentage points and 2.75 percentage points, respectively.    
Credit facility, proceeds from borrowings           $ 0   $ 0
Borrowings under revolving credit facility       0   0   $ 0
Interest expense including amortization of deferred financing fees       $ 6,000 $ 4,000 $ 13,000 $ 8,000  
City National Bank | Subsequent Event                
Debt Instrument [Line Items]                
Credit facility maturity date Jul. 01, 2026              
Credit facility draw date Jul. 01, 2024              
Delayed Draw Term Loan | City National Bank                
Debt Instrument [Line Items]                
Credit facility, borrowing capacity     $ 7,500,000          
Credit facility maturity date           Jun. 24, 2025    
Credit facility extended maturity date           Jul. 01, 2026    
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     2.75%          
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 | Subsequent Event                
Debt Instrument [Line Items]                
Credit facility, borrowing capacity $ 25,500,000              
Delayed Draw Term Loan | City National Bank | Maximum                
Debt Instrument [Line Items]                
Variable rate notes issued for redemption of partners' interests, spread     0.25%          
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 | City National Bank                
Debt Instrument [Line Items]                
Credit facility, borrowing capacity     $ 7,500,000          
Credit facility maturity date           Jun. 21, 2019    
Credit facility extended maturity date   Jun. 19, 2020       Jun. 19, 2020    
Debt covenant, restriction on change in control     30.00%          
Borrowings Under Revolving Credit Agreement | City National Bank | Subsequent Event                
Debt Instrument [Line Items]                
Credit facility, borrowing capacity $ 10,000,000