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v3.22.2.2

Nature of Operations and Summary of Significant Accounting Policies - Additional Information (Detail) |  | 12 Months Ended
--- | --- | ---
Oct. 01, 2020 USD ($) | Sep. 30, 2022 USD ($) shares | Sep. 30, 2021 USD ($) shares
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items] |  |  |
Exercisable stock options, included in the diluted EPS calculation | shares |  |  | 236,000
Effect of dilutive stock options | shares |  | 0 | 116,000
Anti-dilutive exercisable stock options, not included in the diluted EPS calculation | shares |  | 0 | 0
Net unrealized gains (losses) |  | $ (6,864,000) | $ 1,302,000
Transfers of investments between Level 1 and Level 2 |  | 0 | 0
Impairment loss recognized on an asset group |  | 0 | 0
Valuation allowance |  | 0 | 0
Costs and estimated earnings in excess of billings |  | 2,118,000 | 1,903,000
Net revenue |  | 103,479,000 | 85,278,000
Accounts receivable related to contracts with customers |  | 142,000 | 210,000
Total long-term assets |  | $ 16,834,000 | 12,639,000
Blawknox Paver Member [Member] |  |  |
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items] |  |  |
Business Combination, Consideration Transferred | $ 14,400,000 |  | 13,800,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory |  |  | 10,400,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment |  |  | 3,400,000
Maximum [Member] |  |  |
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items] |  |  |
Contract assets collection period |  | 1 year |
Current Liabilities [Member] |  |  |
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items] |  |  |
Customer deposits related to contracts with customers |  | $ 5,864,000 | $ 5,244,000
Revenue [Member] |  |  |
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items] |  |  |
Number of customers |  | 0 | 0
Entities Owned by One Global Company [Member] | Revenue [Member] | No Customer [Member] |  |  |
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items] |  |  |
Percentage of concentration |  | 10.00% | 10.00%
Three to Four Years Old Inventory [Member] |  |  |
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items] |  |  |
Inventory, minimum time period on the shelf, years |  | 3 years |
Inventory, maximum time period on the shelf, years |  | 4 years |
Cost basis reduction in inventory, percentage |  | 50.00% |
Four to Five Years Old Inventory [Member] |  |  |
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items] |  |  |
Inventory, minimum time period on the shelf, years |  | 4 years |
Inventory, maximum time period on the shelf, years |  | 5 years |
Cost basis reduction in inventory, percentage |  | 75.00% |
Greater Than Five Years Old Inventory [Member] |  |  |
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items] |  |  |
Inventory, minimum time period on the shelf, years |  | 5 years |
Inventory valuation estimate |  | $ 0 |

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