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Property and Equipment | 9 Months Ended
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Jun. 30, 2021
Property Plant And Equipment [Abstract] |
Property and Equipment | NOTE 3. PROPERTY AND EQUIPMENT The following table summarizes the Company’s major classes of property and equipment:
|  | June 30, 2021 |  |  | September 30, 2020 |
|  | (In thousands) |
Computers, office equipment and furniture |  | $ | 1,163 |  |  | $ | 662 |
Research equipment |  |  | 23,972 |  |  |  | 20,654 |
Software |  |  | 509 |  |  |  | 631 |
Leasehold improvements |  |  | 42,934 |  |  |  | 25,238 |
Total gross fixed assets |  |  | 68,578 |  |  |  | 47,185 |
Less: Accumulated depreciation and amortization |  |  | (20,792 | ) |  |  | (16,304 | )
Property and equipment, net |  | $ | 47,786 |  |  | $ | 30,881 |
Depreciation and amortization expense for property and equipment for the three months ended June 30, 2021 and 2020 was $1.6 million and $1.1 million, respectively. Depreciation and amortization expense for property and equipment for the nine months ended June 30, 2021 and 2020 was $4.5 million and $2.9 million, respectively.

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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://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=120429125&loc=d3e99893-112916 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -URI http://asc.fasb.org/topic&trid=2155823 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=120429125&loc=SL120174063-112916 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=120429125&loc=d3e99779-112916 + Details
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