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Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Mar. 31, 2021 | Mar. 31, 2020 | Jun. 30, 2020 | Dec. 31, 2020 | Mar. 31, 2019
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Weighted-Average Amortization Period | 16 years 8 months 12 days |  | 16 years 7 months 6 days |  |
Finite lived intangible assets: gross carrying amount | $ 14,050 |  |  | $ 14,452 |
Accumulated amortization | (3,953) |  |  | (3,813) |
Finite lived intangible assets: net | 10,097 |  |  | 10,639 |
Total amortization of finite lived intangible assets | $ 278 | $ 260 |  |  |
Customer relationships |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Weighted-Average Amortization Period | 15 years |  | 15 years |  |
Finite lived intangible assets: gross carrying amount | $ 6,991 |  |  | 7,311 |
Accumulated amortization | (1,748) |  |  | (1,706) |
Finite lived intangible assets: net | $ 5,243 |  |  | 5,605 |
Trade secrets and processes |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Weighted-Average Amortization Period | 20 years |  | 20 years |  |
Finite lived intangible assets: gross carrying amount | $ 5,256 |  |  | 5,256 | $ 5,300
Accumulated amortization | (854) |  |  | (788) |
Finite lived intangible assets: net | $ 4,402 |  |  | 4,468 |
Other Intangible Assets |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Weighted-Average Amortization Period | 5 years |  | 5 years |  |
Finite lived intangible assets: gross carrying amount | $ 1,803 |  |  | 1,885 |
Accumulated amortization | (1,351) |  |  | (1,319) |
Finite lived intangible assets: net | 452 |  |  | $ 566 |
Cost of revenue |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Total amortization of finite lived intangible assets | 66 | 66 |  |  |
Sales, general and administrative |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Total amortization of finite lived intangible assets | $ 212 | $ 194 |  |  |

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- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 + Details
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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 928 -SubTopic 340 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6473545&loc=d3e61844-108004 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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