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Property and Equipment | 12 Months Ended
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Sep. 30, 2023
Property, Plant and Equipment [Abstract] |
Property and Equipment | PROPERTY AND EQUIPMENT The following table summarizes the Company’s major classes of property and equipment:
| September 30,
| 2023 |  | 2022
| (in thousands)
Computers, software, office equipment and furniture | $ | 2,240 |  |  | $ | 2,182 |
Land | 2,996 |  |  | 2,996 |
Research equipment | 56,509 |  |  | 38,283 |
Leasehold improvements | 103,813 |  |  | 42,017 |
Construction in progress | 166,655 |  |  | 56,373 |
| 332,213 |  |  | 141,851 |
Less: Accumulated depreciation and amortization | (41,951) |  |  | (31,554) |
Property and equipment, net | $ | 290,262 |  |  | $ | 110,297 |
Depreciation and amortization expense for property and equipment for the years ended September 30, 2023, 2022, and 2021 was $10.7 million, $8.7 million and $6.6 million respectively. The increase in the construction in progress during 2023 was mainly due to the continuing developments of manufacturing, laboratory and office facilities in Verona, Wisconsin. In May 2023, the Company completed the development of the San Diego facility, which resulted in the reclassification of related construction in progress to leasehold improvements as of September 30, 2023.

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- Definition The entire disclosure for long-lived, physical asset used in normal conduct of business and not intended for resale. Includes, but is not limited to, work of art, historical treasure, and similar asset classified as collections. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 360 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org//360/tableOfContent Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 6 -SubTopic 360 -Topic 958 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480321/958-360-50-6 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d) -SubTopic 360 -Topic 958 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480321/958-360-50-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 7 -SubTopic 360 -Topic 958 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480321/958-360-50-7 + Details
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