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Summary of Operations and Significant Accounting Policies - Summary of Research, Development and Engineering Expense (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
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Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2018
Organization Consolidation And Presentation Of Financial Statements [Abstract] |  |  |  |  |  |  |  |  |  |  |
Research, development and engineering |  |  |  |  |  |  |  |  | $ 3,689 | $ 3,112 | $ 2,868
Grants earned |  |  |  |  |  |  |  |  | (377) | (44) | (12)
Net research, development and engineering | $ 876 | $ 899 | $ 915 | $ 622 | $ 743 | $ 746 | $ 713 | $ 866 | $ 3,312 | $ 3,068 | $ 2,856

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- Definition Research And Development, Net Of Grants + References No definition available. + Details
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- References No definition available. + Details
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- Definition The amount of customer funding recorded as an offset to costs incurred for a fixed-price, best-efforts research and development cost-sharing arrangement with the Federal Government. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 912 -SubTopic 730 -Section 25 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6472174&loc=d3e58812-109433 + Details
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- Definition The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 985 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6501960&loc=d3e128462-111756 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 730 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6420194&loc=d3e21568-108373 + Details
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