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v3.22.1

Detail of Selected Balance Sheet Accounts | 6 Months Ended
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Mar. 31, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Detail of Selected Balance Sheet Accounts | Detail of Selected Balance Sheet Accounts Allowance for Credit Losses Activity in our allowance for credit losses consisted of the following (in thousands):
| Three months ended March 31, |  | Six months ended March 31,
| 2022 |  | 2021 |  | 2022 |  | 2021
Balance at beginning of period | $ | 411 |  |  | $ | 493 |  |  | $ | 333 |  |  | $ | 510 |
Bad debt expense (recovery), net | 353 |  |  | (113) |  |  | 445 |  |  | (132) |
Uncollectible accounts written off, net of recoveries | (57) |  |  | — |  |  | (71) |  |  | (10) |
Change due to foreign currency translation | (4) |  |  | 2 |  |  | (4) |  |  | 14 |
Balance at end of period | $ | 703 |  |  | $ | 382 |  |  | $ | 703 |  |  | $ | 382 |
Inventories The components of inventories are summarized below (in thousands):
| March 31, 2022 |  | September 30, 2021
Raw materials, parts and sub-assemblies, net | $ | 42,282 |  |  | $ | 28,688 |
Work-in-progress | 1,403 |  |  | 1,147 |
Total inventories | $ | 43,685 |  |  | $ | 29,835 |
Accrued Product Warranty Activity in our product warranty accrual consisted of the following (in thousands):
| Three months ended March 31, |  | Six months ended March 31,
| 2022 |  | 2021 |  | 2022 |  | 2021
Balance at beginning of period | $ | 2,443 |  |  | $ | 2,675 |  |  | $ | 2,531 |  |  | $ | 2,771 |
Increase to warranty expense | 323 |  |  | 395 |  |  | 616 |  |  | 1,053 |
Deduction for warranty charges | (421) |  |  | (609) |  |  | (803) |  |  | (1,388) |
Change due to foreign currency translation | 2 |  |  | 6 |  |  | 3 |  |  | 31 |
Balance at end of period | $ | 2,347 |  |  | $ | 2,467 |  |  | $ | 2,347 |  |  | $ | 2,467 |

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- Definition The entire disclosure for supplemental balance sheet disclosures, including descriptions and amounts for assets, liabilities, and equity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -URI http://asc.fasb.org/topic&trid=2122208 + Details
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