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Long-term Debt - Additional Information (Details)
3 Months Ended 6 Months Ended
Apr. 23, 2020
USD ($)
Nov. 08, 2018
USD ($)
Apr. 29, 2016
USD ($)
Jun. 30, 2020
USD ($)
Jun. 30, 2019
USD ($)
Jun. 30, 2020
USD ($)
Jun. 30, 2019
USD ($)
Aug. 07, 2020
USD ($)
Apr. 24, 2020
USD ($)
Apr. 03, 2020
USD ($)
Dec. 29, 2019
USD ($)
Jul. 16, 2019
USD ($)
Nov. 01, 2018
USD ($)
Sep. 20, 2018
USD ($)
Aug. 18, 2017
USD ($)
Debt Instrument [Line Items]                              
Outstanding principal amount       $ 40,641,000   $ 40,641,000         $ 36,067,000        
Debt issuance cost       300,000   300,000         300,000        
Unamortized discount       334,000   334,000         400,000        
Amortization expense of debt issuance costs       40,000.00 $ 40,000.00 100,000 $ 100,000                
Promissory note       51,113,000   $ 51,113,000                  
Promissory Note | PPP under CARES Act                              
Debt Instrument [Line Items]                              
Promissory note                 $ 6,000,000.0            
Interest                 1.00%            
Credit agreement | Line of credit | Secured debt                              
Debt Instrument [Line Items]                              
Maximum borrowing capacity     $ 62,000,000.0                        
Maximum increase to principal amount     10,000,000.0                        
Credit agreement | Line of credit | Secured debt | Base Rate | Minimum                              
Debt Instrument [Line Items]                              
Basis spread on variable rate           1.75%                  
Credit agreement | Line of credit | Secured debt | Base Rate | Maximum                              
Debt Instrument [Line Items]                              
Basis spread on variable rate           3.25%                  
Credit agreement | Line of credit | Secured debt | LIBOR | Minimum                              
Debt Instrument [Line Items]                              
Basis spread on variable rate           2.75%                  
Credit agreement | Line of credit | Secured debt | LIBOR | Maximum                              
Debt Instrument [Line Items]                              
Basis spread on variable rate           4.25%                  
Credit agreement | Letter of credit | Revolving credit facility                              
Debt Instrument [Line Items]                              
Maximum borrowing capacity     2,000,000.0                        
New revolver | Revolving credit facility                              
Debt Instrument [Line Items]                              
Line of credit       10,100,000   $ 10,100,000                  
New revolver | Line of credit | Revolving credit facility                              
Debt Instrument [Line Items]                              
Maximum borrowing capacity     30,000,000.0 $ 700,000   $ 700,000             $ 30,000,000.0 $ 32,500,000  
Senior notes     22,900,000                        
Line of credit                             $ 4,000,000.0
Effective interest rate       5.00%   5.00%                  
Remaining borrowing capacity       $ 13,500,000   $ 13,500,000                  
US Term loan | Line of credit | Secured debt                              
Debt Instrument [Line Items]                              
Debt instrument, face amount     17,000,000.0                        
CA term loan | Line of credit | Secured debt                              
Debt Instrument [Line Items]                              
Debt instrument, face amount     $ 15,000,000.0                        
Outstanding principal amount       $ 9,648,000   $ 9,648,000         10,384,000        
Effective interest rate       5.00%   5.00%                  
Unamortized discount       $ 100,000   $ 100,000                  
US Term Loan II | Line of credit | Secured debt                              
Debt Instrument [Line Items]                              
Debt instrument, face amount                             $ 4,000,000.0
Amended And Restated Credit Agreement                              
Debt Instrument [Line Items]                              
Debt instrument, covenant, liquidity amount required, minimum                       $ 5,000,000      
Debt instrument, total covenant, leverage ratio                       2.00      
Debt instrument, covenant, leverage ratio after DSCR                       1.10      
Debt Instrument, covenant, consolidated EBITDA                   $ 600,000          
Amended And Restated Credit Agreement | Subsequent Event                              
Debt Instrument [Line Items]                              
Debt Instrument, Covenant, Debt Costs Maximum               $ 175,000              
Debt Instrument, Covenant, Restructuring Costs Maximum               500,000              
Amended And Restated Credit Agreement | Debt Instrument, Period One | Subsequent Event                              
Debt Instrument [Line Items]                              
Debt Instrument, Covenant, Purchase And Enterprise Resource Planning Costs Maximum               200,000              
Amended And Restated Credit Agreement | Debt Instrument, Period Two | Subsequent Event                              
Debt Instrument [Line Items]                              
Debt Instrument, Covenant, Purchase And Enterprise Resource Planning Costs Maximum               $ 100,000              
Amended And Restated Credit Agreement | PPP under CARES Act                              
Debt Instrument [Line Items]                              
Debt instrument, covenant, debt amount, maximum $ 6,000,000.0                            
Amended And Restated Credit Agreement | Line of credit | Secured debt | Base Rate | Minimum | PPP under CARES Act                              
Debt Instrument [Line Items]                              
Basis spread on variable rate 2.00%                            
Amended And Restated Credit Agreement | Line of credit | Secured debt | LIBOR | Minimum | PPP under CARES Act                              
Debt Instrument [Line Items]                              
Basis spread on variable rate 1.00%                            
New US Term Loan | Line of credit | Secured debt                              
Debt Instrument [Line Items]                              
Outstanding principal amount       $ 23,743,000   $ 23,743,000         $ 24,383,000        
Effective interest rate       5.00%   5.00%                  
Unamortized discount       $ 300,000   $ 300,000                  
Senior credit facility, second amendment | Line of credit | Revolving credit facility                              
Debt Instrument [Line Items]                              
Letters of credit outstanding, amount       100,000   100,000                  
Senior credit facility | Line of credit | Revolving credit facility                              
Debt Instrument [Line Items]                              
Debt issuance cost       $ 0   $ 0                  
US Borrower And CA Borrower | US Term loan | Line of credit | Secured debt                              
Debt Instrument [Line Items]                              
Maximum increase to principal amount   $ 26,000,000.0                          
US Borrower And CA Borrower | CA term loan | Line of credit | Secured debt                              
Debt Instrument [Line Items]                              
Outstanding principal amount   $ 12,000,000.0                          
US Borrower And CA Borrower | Amended And Restated Credit Agreement | Line of credit                              
Debt Instrument [Line Items]                              
Debt instrument, term   5 years                          
Debt instrument, term to fund capital expenditures   2 years                          
US Borrower And CA Borrower | Amended And Restated Credit Agreement | Line of credit | Revolving credit facility                              
Debt Instrument [Line Items]                              
Maximum borrowing capacity   $ 30,000,000.0                          
US Borrower And CA Borrower | New US Term Loan | Line of credit | Secured debt                              
Debt Instrument [Line Items]                              
Debt instrument, face amount   26,000,000.0                          
US Borrower And CA Borrower | US Term Loan And Term Loan II | Line of credit | Secured debt                              
Debt Instrument [Line Items]                              
Debt instrument, face amount   15,900,000                          
November 8, 2019 | US Borrower And CA Borrower | Amended And Restated Credit Agreement | Line of credit for capital expenditures                              
Debt Instrument [Line Items]                              
Maximum borrowing capacity   2,500,000                          
November 8, 2020 | US Borrower And CA Borrower | Amended And Restated Credit Agreement | Line of credit for capital expenditures                              
Debt Instrument [Line Items]                              
Maximum borrowing capacity   5,000,000.0                          
September 30, 2020 | US Borrower And CA Borrower | New US Term Loan | Line of credit | Secured debt                              
Debt Instrument [Line Items]                              
Principal payment   337,500                          
September 30, 2021 | US Borrower And CA Borrower | New US Term Loan | Line of credit | Secured debt                              
Debt Instrument [Line Items]                              
Principal payment   575,000.0                          
Thereafter though maturity | US Borrower And CA Borrower | New US Term Loan | Line of credit | Secured debt                              
Debt Instrument [Line Items]                              
Principal payment   $ 812,500