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Nature of Business and Summary of Significant Accounting Policies - Intangible Assets (Details) - USD ($) | 1 Months Ended | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Aug. 31, 2008 | Mar. 31, 2022 | Mar. 31, 2021 | Jun. 30, 2020 | Mar. 31, 2022 | Mar. 31, 2021 | Jun. 30, 2021
Intangible assets |  |  |  |  |  |  |
Impairment of intangible asset |  |  |  | $ 1,852,000 |  |  |
Useful life |  |  |  | 20 years |  |  |
Amortization expense |  | $ 98,000 | $ 106,000 |  | $ 293,000 | $ 319,000 |
Changes in intangible assets |  |  |  |  |  |  |
Carrying value |  | 13,848,000 |  |  | 13,848,000 |  |
Accumulated amortization |  | (9,450,000) |  |  | (9,450,000) |  |
Net book value |  | 4,398,000 |  |  | 4,398,000 |  | $ 4,691,000
Future amortization expense |  |  |  |  |  |  |
2022 |  | 390,000 |  |  | 390,000 |  |
2023 |  | 361,000 |  |  | 361,000 |  |
2024 |  | 336,000 |  |  | 336,000 |  |
2025 |  | 315,000 |  |  | 315,000 |  |
2026 |  | 297,000 |  |  | $ 297,000 |  |
Weighted average remaining period |  |  |  |  | 16 years 3 months 18 days |  | 16 years 10 months 24 days
Customer relationships [Member] |  |  |  |  |  |  |
Intangible assets |  |  |  |  |  |  |
Useful life | 20 years |  |  |  |  |  |
Changes in intangible assets |  |  |  |  |  |  |
Carrying value |  | 9,800,000 |  |  | $ 9,800,000 |  |
Accumulated amortization |  | (9,096,000) |  |  | (9,096,000) |  |
Net book value |  | 704,000 |  |  | 704,000 |  |
Trade name |  |  |  |  |  |  |
Changes in intangible assets |  |  |  |  |  |  |
Carrying value |  | 4,048,000 |  |  | 4,048,000 |  |
Accumulated amortization |  | (354,000) |  |  | (354,000) |  |
Net book value |  | $ 3,694,000 |  |  | $ 3,694,000 |  |

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- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 + Details
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