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Note 7 - Investment Properties (Details Textual) ¥ in Thousands, $ in Thousands | 3 Months Ended | 6 Months Ended | 9 Months Ended | 10 Months Ended | 12 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Mar. 31, 2022 USD ($) | Mar. 31, 2021 USD ($) | Apr. 30, 2021 USD ($) | Mar. 31, 2022 USD ($) | Mar. 31, 2021 USD ($) | Mar. 31, 2022 USD ($) | Mar. 31, 2022 CNY (¥) | Jun. 30, 2021 USD ($) | Oct. 31, 2020 USD ($) ft² | Oct. 31, 2020 CNY (¥) ft² | Jun. 30, 2010 USD ($) | Jun. 30, 2010 CNY (¥) | Mar. 31, 2022 CNY (¥) | Jun. 30, 2021 CNY (¥) | May 21, 2021 m² | Mar. 31, 2010 USD ($) a | Mar. 31, 2010 CNY (¥) a | Mar. 31, 2008 USD ($) | Mar. 31, 2008 CNY (¥)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 894 |  |  | $ 894 |  | $ 894 |  | $ 894 |  |  |  |  | ¥ 5,554 | ¥ 5,554 |  |  |  |  |
TTCQ [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Lease, Operating Lease, Number of Properties |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2 | 2 | 2 |  |
Area of Real Estate Property (Acre) |  |  |  |  |  |  |  |  | 161 | 161 |  |  |  |  | 154.49 | 311.99 | 311.99 |  |
Purchase Obligation, Total |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 648 | ¥ 4,025 |  |
Lessee, Operating Lease, Term of Contract (Year) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2 years |  |  |  |
Lessee, Operating Lease, Monthly Rate |  |  | $ 1 |  |  | 1 | ¥ 9 |  | $ 1 |  |  |  |  |  |  |  |  |  |
Lessor, Operating Lease, Monthly Rate |  |  | $ 10 |  |  |  |  |  |  | ¥ 10 |  |  |  |  |  |  |  |  |
Mao Ye [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 5,554 | ¥ 894
Operating Lease, Lease Income, Total |  | $ 6 |  | 4 | $ 9 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Depreciation, Total | 4 | 4 |  | 12 | 11 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Jiang Huai [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land | 580 |  |  | 580 |  | $ 580 |  | 580 |  |  |  |  | ¥ 3,600 | 3,600 |  |  |  |  |
Depreciation, Total | $ 7 | 6 |  | $ 21 | 19 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payments to Acquire Projects |  |  |  |  |  |  |  |  |  |  | $ 580 | ¥ 3,600 |  |  |  |  |  |  |
Number of Auctions | 3 |  |  | 3 |  | 3 |  |  |  |  |  |  | 3 |  |  |  |  |  |
FuLi [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 648 |  |  | $ 648 |  | $ 648 |  | $ 648 |  |  |  |  | ¥ 4,025 | ¥ 4,025 |  |  |  |  |
Operating Lease, Lease Income, Total | 4 | 5 |  | 19 | 12 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Depreciation, Total | 8 | 7 |  | 23 | 22 |  |  |  |  |  |  |  |  |  |  |  |  |  |
CHINA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating Lease, Lease Income, Total | 4 | 11 |  | 23 | 21 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Depreciation, Total | $ 19 | $ 17 |  | $ 56 | $ 52 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Real Estate [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment, Useful Life (Year) |  |  |  | 20 years |  |  |  | 20 years |  |  |  |  |  |  |  |  |  |  |

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