Annual report pursuant to Section 13 and 15(d)

Debt - Additional Information (Detail)

v3.7.0.1
Debt - Additional Information (Detail)
1 Months Ended 12 Months Ended
Aug. 01, 2017
USD ($)
Aug. 02, 2016
USD ($)
Aug. 01, 2015
USD ($)
Nov. 01, 2014
USD ($)
Jun. 24, 2013
USD ($)
Installment
Jun. 03, 2013
USD ($)
Jun. 30, 2018
USD ($)
Jun. 30, 2017
USD ($)
Jun. 30, 2016
USD ($)
Dec. 31, 2016
USD ($)
Installment
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Jun. 30, 2015
USD ($)
Oct. 31, 2014
USD ($)
Debt Instrument [Line Items]                            
Interest expense including amortization of deferred financing fees                   $ 228,000 $ 261,000 $ 381,000    
Promissory Note                            
Debt Instrument [Line Items]                            
Variable rate notes issued for redemption of partners' interests, spread           1.00%                
Debt instrument variable interest rate basis                   The principal amount outstanding under these notes bear interest at the U.S. Prime Rate plus 1% in effect at the time payments are due.        
Aggregate principal amount           $ 5,300,000                
Debt instrument reduction to principal amount                           $ 1,722,000
Principal amount of notes                   $ 3,578,000        
Principal amount payment terms                   As a result, the principal amounts of the notes of $3,578 are payable in four equal installments of approximately $900 on November 1, 2014, and on each of August 1, 2015, 2016 and 2017.        
Number of installments | Installment                   4        
Installment amount payable   $ 900,000 $ 900,000 $ 900,000                    
Principal amount of notes outstanding                   $ 895,000 1,789,000      
Accrued, unpaid interest                   $ 17,000 32,000      
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          
Principal amount of notes outstanding                   $ 1,443,000 2,165,000      
Accrued, unpaid interest                   36,000 55,000      
Promissory Note | Scenario Forecast                            
Debt Instrument [Line Items]                            
Installment amount payable $ 900,000                          
Promissory Note | Scenario Forecast | Jamison                            
Debt Instrument [Line Items]                            
Installment amount payable             $ 722,000 $ 722,000            
City National Bank                            
Debt Instrument [Line Items]                            
Credit facility, borrowing capacity         $ 15,000,000                  
Credit facility, proceeds from borrowings         7,000,000                  
Borrowings under revolving credit facility                   0 0      
Interest expense including amortization of deferred financing fees                   $ 47,000 $ 40,000 $ 148,000    
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 | City National Bank                            
Debt Instrument [Line Items]                            
Credit facility, borrowing capacity         $ 7,500,000                  
Credit facility maturity date                   Dec. 24, 2016        
Debt covenant, restriction on change in control         30.00%