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PROPERTY, PLANT AND EQUIPMENT | 3 Months Ended
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Sep. 30, 2021
PROPERTY, PLANT AND EQUIPMENT |
PROPERTY, PLANT AND EQUIPMENT | NOTE 3 — PROPERTY, PLANT AND EQUIPMENT Property, plant and equipment consist of the following (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | September 30, |  | June 30,
​ | ​ | 2021 | ​ | 2021
Production equipment | ​ | $ | 307 | ​ | $ | 307
Leasehold improvements | ​ |  | 202 | ​ |  | 202
Furniture and fixtures | ​ |  | 45 | ​ |  | 45
Computer equipment | ​ |  | 44 | ​ |  | 44
Other equipment | ​ |  | 114 | ​ |  | 114
​ | ​ |  | 712 | ​ |  | 712
Accumulated depreciation | ​ |  | (704) | ​ |  | (691)
Net property plant and equipment | ​ | $ | 8 | ​ | $ | 21
​ Depreciation expense related to property, plant and equipment was $13,000 and $34,000 for the three months ended September 30, 2021 and 2020, respectively, of which $9,000 and $30,000 is included in cost of goods sold and $4,000 and $4,000 in general and administrative expense, respectively. ​ NOTE 3 — PROPERTY, PLANT AND EQUIPMENT (continued) Depreciation of property, plant and equipment is calculated using the straight-line method over their estimated useful lives as follows: ​
​ | ​ | ​
​ |  | Useful Lives
Leasehold improvements |  | 5 years or remaining lease term
Furniture and fixtures |  | 5 years
Production equipment |  | 3 – 7 years
Computer equipment |  | 3 years
Other equipment |  | 3 – 7 years
​

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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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