Debt - Additional Information (Details) | Dec. 27, 2021 | Dec. 27, 2020 | Sep. 30, 2020 | Dec. 27, 2019 | Dec. 27, 2017USD ($)Facility | Dec. 23, 2016USD ($) | Oct. 31, 2017USD ($)Loan | Sep. 30, 2018USD ($) | Dec. 31, 2017USD ($) |
Line Of Credit Facility [Line Items] | | | | | | | | | |
Amount drawn by company, previously outstanding | | | | | | | | $ 15,740,000 | $ 12,511,000 |
Number of Loan Agreements | Loan | | | | | | | 2 | | |
Amended and restated credit agreement, minimum fixed charge coverage ratio | | | | | | | | 120.00% | |
Scenario, Forecast | | | | | | | | | |
Line Of Credit Facility [Line Items] | | | | | | | | | |
Amended and restated credit agreement, leverage ratio | | | 225.00% | | | | | | |
Maximum | | | | | | | | | |
Line Of Credit Facility [Line Items] | | | | | | | | | |
Amended and restated credit agreement, leverage ratio | | | | | | | | 400.00% | |
Amended and restated credit agreement, capital expenditure in any fiscal year | | | | | | | | $ 2,000,000 | |
3% Interest Loan Agreements with State Agencies | | | | | | | | | |
Line Of Credit Facility [Line Items] | | | | | | | | | |
Borrowing term option for funds borrowed under the LIBOR option | | | | | | | 10 years | | |
Debt instrument, face amount | | | | | | | $ 300,000 | | |
Debt instrument, interest rate | | | | | | | 3.00% | | |
3% Interest Loan Agreements with State Agencies | If Company attain and maintain agreed upon employment levels on fifth anniversary date of loan | | | | | | | | | |
Line Of Credit Facility [Line Items] | | | | | | | | | |
Debt instrument amount of indebtedness forgiven | | | | | | | $ 150,000 | | |
3% Interest Loan Agreements with State Agencies | If Company attain and maintain agreed upon employment levels at tenth anniversary of loan | | | | | | | | | |
Line Of Credit Facility [Line Items] | | | | | | | | | |
Debt instrument amount of indebtedness forgiven | | | | | | | 150,000 | | |
3% Interest Loan Agreements with State Agencies | If Company not attain or maintain the agreed upon levels of employment | | | | | | | | | |
Line Of Credit Facility [Line Items] | | | | | | | | | |
Debt instrument amount of indebtedness forgiven | | | | | | | $ 150,000 | | |
No Interest Loan Agreements with State Agencies | | | | | | | | | |
Line Of Credit Facility [Line Items] | | | | | | | | | |
Borrowing term option for funds borrowed under the LIBOR option | | | | | | | 75 months | | |
Debt Instrument, frequency of periodic payment | | | | | | | monthly | | |
Debt instrument, face amount | | | | | | | $ 125,000 | | |
Debt instrument, interest rate | | | | | | | 0.00% | | |
No Interest Loan Agreements with State Agencies | ASV attain and maintain job creation goals and wage level commitments | | | | | | | | | |
Line Of Credit Facility [Line Items] | | | | | | | | | |
Debt instrument amount of indebtedness forgiven | | | | | | | $ 50,000 | | |
PNC and White Oak | | | | | | | | | |
Line Of Credit Facility [Line Items] | | | | | | | | | |
Credit facility, maximum borrowing capacity | | | | | | $ 65,000,000 | | | |
Credit facility, term | | | | | | 5 years | | | |
Amount drawn by company | | | | | | $ 46,700,000 | | | |
PNC | Term Loan A Facility | | | | | | | | | |
Line Of Credit Facility [Line Items] | | | | | | | | | |
Credit facility, maximum borrowing capacity | | | | | | 8,500,000 | | | |
PNC | Term Loan C Facility | | | | | | | | | |
Line Of Credit Facility [Line Items] | | | | | | | | | |
Credit facility, maximum borrowing capacity | | | | | $ 15,000,000 | | | | |
White Oak | Term Loan B Facility | | | | | | | | | |
Line Of Credit Facility [Line Items] | | | | | | | | | |
Credit facility, maximum borrowing capacity | | | | | | 21,500,000 | | | |
PNC and Another Lender | | | | | | | | | |
Line Of Credit Facility [Line Items] | | | | | | | | | |
Credit facility, maximum borrowing capacity | | | | | $ 50,000,000 | | | | |
Credit facility, term | | | | | 5 years | | | | |
Amount drawn by company | | | | | $ 28,400,000 | | | | |
Amount drawn by company, new borrowings | | | | | 18,700,000 | | | | |
PNC and Another Lender | Term Loan C Facility | | | | | | | | | |
Line Of Credit Facility [Line Items] | | | | | | | | | |
Credit facility, maximum borrowing capacity | | | | | $ 15,000,000 | | | | |
Revolving Credit Facility | PNC | | | | | | | | | |
Line Of Credit Facility [Line Items] | | | | | | | | | |
Credit facility, maximum borrowing capacity | | | | | | $ 35,000,000 | | | |
Amount drawn by company | | | | | | | | $ 15,740,000 | |
Number of sub-facilities | Facility | | | | | 2 | | | | |
Credit facility, maturity date | | | | | Dec. 27, 2022 | | | | |
Description on revolving loan facility | | | | | | | | The maximum amount available is limited to (i) the sum of (a) up to 85% of Eligible Receivables, plus (b) 90% of Eligible Insured Foreign Receivables, plus (c) the lesser of (I) 95% of Eligible CAT Receivables, or $8,600 plus (ii) the lesser of (A) the sum of (I) up to 65% of the value of the Eligible Inventory (other than Eligible Inventory consisting of finished goods machines and service parts that are current), plus (II) 80% of the value of Eligible inventory consisting of finished goods machines, plus (III) 75% of the value of Eligible Inventory consisting of service parts that are current) or, (B) up to 90% of the appraised net orderly liquidation value of Eligible Inventory. | |
Percentage of eligible insured foreign receivables | | | | | 90.00% | | | | |
Eligible CAT receivables amount | | | | | $ 8,600,000 | | | | |
Borrowing base percentage on eligible inventory consisting of finished goods machines | | | | | 80.00% | | | | |
Borrowing base percentage on eligible inventory consisting of current service parts | | | | | 75.00% | | | | |
Line of credit facility, inventory collateral description | | | | | | | | Inventory collateral is capped at $15,000 less outstanding letters of credit and any reasonable reserves as established by the bank. | |
Inventory collateral, gross value | | | | | $ 15,000,000 | | | | |
Credit facility, available borrowing capacity | | | | | | | | $ 22,475,000 | |
Line of credit facility interest rate description | | | | | | | | The domestic rate spread is initially fixed at 1.00% for revolving loan advances until delivery of certain reporting documents with respect to fiscal quarter ending March 31, 2018, at which point it ranges from 1.00% to 1.5% depending on the Average Undrawn Availability (as defined in the Amended and Restated Credit Agreement). The LIBOR spread is initially fixed at 2.00% for revolving loan advances until delivery of the same reporting documents, at which point it ranges from 2.00% to 2.5% depending on the Average Undrawn Availability. | |
Weighted average interest rate | | | | | | | | 4.70% | |
Unused line fee | | | | | | | | 0.25% | |
Revolving Credit Facility | PNC | Domestic Rate | | | | | | | | | |
Line Of Credit Facility [Line Items] | | | | | | | | | |
Interest rate under credit agreement | | | | | | | | 1.00% | |
Revolving Credit Facility | PNC | LIBOR | | | | | | | | | |
Line Of Credit Facility [Line Items] | | | | | | | | | |
Interest rate under credit agreement | | | | | | | | 2.00% | |
Revolving Credit Facility | PNC | One Month LIBOR | | | | | | | | | |
Line Of Credit Facility [Line Items] | | | | | | | | | |
Borrowing term option for funds borrowed under the LIBOR option | | | | | | | | 1 month | |
Revolving Credit Facility | PNC | Two Month LIBOR | | | | | | | | | |
Line Of Credit Facility [Line Items] | | | | | | | | | |
Borrowing term option for funds borrowed under the LIBOR option | | | | | | | | 2 months | |
Revolving Credit Facility | PNC | Three Month LIBOR | | | | | | | | | |
Line Of Credit Facility [Line Items] | | | | | | | | | |
Borrowing term option for funds borrowed under the LIBOR option | | | | | | | | 3 months | |
Revolving Credit Facility | PNC | Maximum | | | | | | | | | |
Line Of Credit Facility [Line Items] | | | | | | | | | |
Percentage of eligible receivables | | | | | 85.00% | | | | |
Percentage of eligible CAT receivables | | | | | 95.00% | | | | |
Borrowing Base percentage on eligible inventory other than finished goods machines and service parts | | | | | 65.00% | | | | |
Percentage of net orderly liquidation value of eligible inventory | | | | | 90.00% | | | | |
Revolving Credit Facility | PNC | Maximum | Domestic Rate | | | | | | | | | |
Line Of Credit Facility [Line Items] | | | | | | | | | |
Interest rate under credit agreement | | | | | | | | 1.50% | |
Revolving Credit Facility | PNC | Maximum | LIBOR | | | | | | | | | |
Line Of Credit Facility [Line Items] | | | | | | | | | |
Interest rate under credit agreement | | | | | | | | 2.50% | |
Revolving Credit Facility | PNC | Minimum [Member] | Domestic Rate | | | | | | | | | |
Line Of Credit Facility [Line Items] | | | | | | | | | |
Interest rate under credit agreement | | | | | | | | 1.00% | |
Revolving Credit Facility | PNC | Minimum [Member] | LIBOR | | | | | | | | | |
Line Of Credit Facility [Line Items] | | | | | | | | | |
Interest rate under credit agreement | | | | | | | | 2.00% | |
Revolving Credit Facility | PNC | Letter of Credit Sub-Facility | | | | | | | | | |
Line Of Credit Facility [Line Items] | | | | | | | | | |
Credit facility, maximum borrowing capacity | | | | | $ 2,000,000 | | | | |
Revolving Credit Facility | PNC | Swing Loan Sub-Facility | | | | | | | | | |
Line Of Credit Facility [Line Items] | | | | | | | | | |
Credit facility, maximum borrowing capacity | | | | | 3,500,000 | | | | |
Revolving Credit Facility | PNC and Another Lender | | | | | | | | | |
Line Of Credit Facility [Line Items] | | | | | | | | | |
Credit facility, maximum borrowing capacity | | | | | 35,000,000 | | | | |
Amount drawn by company, previously outstanding | | | | | $ 9,700,000 | | | | |
PNC | Term Loan C Facility | | | | | | | | | |
Line Of Credit Facility [Line Items] | | | | | | | | | |
Amount drawn by company | | | | | | | | $ 13,500,000 | |
Description on revolving loan facility | | | | | | | | one, two, or three months | |
Weighted average interest rate | | | | | | | | 6.90% | |
Payments of debt issuance costs | | | | | | | | $ 285,000 | |
Net debt | | | | | | | | 13,215,000 | |
Quarterly principal payment of loan | | | | | | | | $ 500,000 | |
Debt Instrument, frequency of periodic payment | | | | | | | | quarterly | |
Payment commencing date | | | | | | | | Jan. 1, 2018 | |
Debt instrument maturity date | | | | | | | | Dec. 27, 2022 | |
Frequency of interest payments | | | | | | | | monthly | |
PNC | Term Loan C Facility | Scenario, Forecast | | | | | | | | | |
Line Of Credit Facility [Line Items] | | | | | | | | | |
Prepayment penalty percent | 0.00% | 1.00% | | 2.00% | | | | | |
PNC | Term Loan C Facility | Domestic Rate | | | | | | | | | |
Line Of Credit Facility [Line Items] | | | | | | | | | |
Interest rate under credit agreement | | | | | | | | 3.75% | |
PNC | Term Loan C Facility | LIBOR | | | | | | | | | |
Line Of Credit Facility [Line Items] | | | | | | | | | |
Interest rate under credit agreement | | | | | | | | 4.75% | |