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INTANGIBLE ASSETS | 3 Months Ended
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Sep. 30, 2021
INTANGIBLE ASSETS |
INTANGIBLE ASSETS | NOTE 4 — INTANGIBLE ASSETS The following table summarizes the Company’s intangible assets as of September 30, 2021 (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Amortization |  | Gross Asset |  | Accumulated |  | Net Book
​ | ​ | Period | ​ | Cost | ​ | Amortization | ​ | Value
Customer relationships |  | 11 years | ​ | $ | 970 | ​ | $ | 191 | ​ | $ | 779
Patents |  | 20 years | ​ |  | 70 | ​ |  | 8 | ​ |  | 62
Trademark |  | 20 years | ​ |  | 78 | ​ |  | 8 | ​ |  | 70
​ | ​ | ​ | ​ | $ | 1,118 | ​ | $ | 207 | ​ | $ | 911
​ The following table summarizes the Company’s intangible assets as of June 30, 2021 (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Amortization |  | Gross Asset |  | Accumulated |  | Net Book
​ | ​ | Period | ​ | Cost | ​ | Amortization | ​ | Value
Customer relationships |  | 11 years | ​ | $ | 970 | ​ | $ | 169 | ​ | $ | 801
Patents |  | 20 years | ​ |  | 70 | ​ |  | 7 | ​ |  | 63
Trademark |  | 20 years | ​ |  | 78 | ​ |  | 7 | ​ |  | 71
​ | ​ | ​ | ​ | $ | 1,118 | ​ | $ | 183 | ​ | $ | 935
​ Amortization expense was $24,000 and $24,000 for the three months ended September 30, 2021 and 2020, respectively, and is included in general and administrative expense. ​ Estimated amortization expense related to intangible assets subject to amortization at September 30, 2021 in each of the five fiscal years subsequent to September 30, 2021, and thereafter is as follows (amounts in thousands): ​
​ | ​ | ​ | ​
2022 remaining |  | $ | 72
2023 | ​ |  | 96
2024 | ​ |  | 96
2025 | ​ |  | 96
2026 | ​ |  | 96
Thereafter | ​ |  | 455
Total | ​ | $ | 911
​

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- Definition The entire disclosure for goodwill and intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -URI http://asc.fasb.org/topic&trid=2144416 + Details
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