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Other Balance Sheet Information (Tables) | 9 Months Ended
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Jun. 30, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Summary of Accounts Receivable | The following is a summary of accounts receivable at June 30, 2022 and September 30, 2021 (in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | June 30, | ​ | September 30, | ​
​ |  | 2022 |  | 2021 |
Accounts receivable | ​ | $ | 154,600 | ​ | $ | 124,195 | ​
Less allowance for expected credit losses | ​ |  | (4,326) | ​ |  | (4,318) | ​
Accounts receivable, net | ​ | $ | 150,274 | ​ | $ | 119,877 | ​
Summary of Inventories | ​ ​ The following is a summary of inventories at June 30, 2022 and September 30, 2021 (in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | June 30, |  | September 30, | ​
​ |  | 2022 |  | 2021 |
Inventories |  | ​ |  |  |  |  |
Raw materials and purchased parts |  | $ | 35,594 |  | $ | 27,644 | ​
Work-in-process |  | ​ | 5,855 |  | ​ | 4,787 | ​
Finished goods |  | ​ | 39,764 |  | ​ | 27,967 | ​
Total inventories |  | $ | 81,213 |  | $ | 60,398 | ​
​ ​
Product Warranty and Retrofit Activity on Gross Basis | The following is a summary of product warranty and retrofit activity on a gross basis for the three and nine months ended June 30, 2022 and 2021 (in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Activity -Three Months Ended June 30, 2022
Balance |  | ​ | ​ |  | ​ | ​ |  | Balance
March 31, | ​ | ​ | ​ | ​ | ​ | ​ | ​ | June 30,
2022 | ​ | Accruals | ​ | Costs Incurred | ​ | 2022
$ | 2,491 | ​ | $ | 663 | ​ | $ | (630) | ​ | $ | 2,524
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Activity -Three Months Ended June 30, 2021
Balance |  | ​ | ​ |  | ​ | ​ |  | Balance
March 31, | ​ | ​ | ​ | ​ | ​ | ​ | ​ | June 30,
2021 | ​ | Accruals | ​ | Costs Incurred | ​ | 2021
$ | 2,182 | ​ | $ | 858 | ​ | $ | (703) | ​ | $ | 2,337
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Activity -Nine Months Ended June 30, 2022
Balance |  | ​ | ​ |  | ​ | ​ |  | Balance
September 30, | ​ | ​ | ​ | ​ | ​ | ​ | ​ | June 30,
2021 | ​ | Accruals | ​ | Costs Incurred | ​ | 2022
$ | 2,330 | ​ | $ | 1,875 | ​ | $ | (1,681) | ​ | $ | 2,524
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Activity -Nine Months Ended June 30, 2021
Balance |  | ​ | ​ |  | ​ | ​ |  | Balance
September 30, | ​ | ​ | ​ | ​ | ​ | ​ | ​ | June 30,
2020 | ​ | Accruals | ​ | Costs Incurred | ​ | 2021
$ | 2,211 | ​ | $ | 1,671 | ​ | $ | (1,545) | ​ | $ | 2,337

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- Definition Tabular disclosure of the various types of trade accounts and notes receivable and for each the gross carrying value, allowance, and net carrying value as of the balance sheet date. Presentation is categorized by current, noncurrent and unclassified receivables. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3,4) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition Tabular disclosure of the carrying amount as of the balance sheet date of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(6)(c)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(6)(b)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(6)(a)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=6361739&loc=d3e7789-107766 + Details
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- Definition Tabular disclosure of the changes in the guarantor's aggregate product warranty liability, including the beginning balance of the aggregate product warranty liability, the aggregate reductions in that liability for payments made (in cash or in kind) under the warranty, the aggregate changes in the liability for accruals related to product warranties issued during the reporting period, the aggregate changes in the liability for accruals related to preexisting warranties (including adjustments related to changes in estimates), and the ending balance of the aggregate product warranty liability. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -URI https://asc.fasb.org/extlink&oid=126907703&loc=d3e12565-110249 + Details
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