Note 5 - Investments - Marketable Securities (Details) - USD ($) $ in Thousands |
Mar. 31, 2020 |
Mar. 31, 2019 |
|---|---|---|
| Total investments | $ 8,908 | |
| Short-term investments | 8,888 | |
| Investments | 20 | |
| Deposits [Member] | ||
| Total investments | 2,020 | |
| Canadian Treasury Bill [Member] | ||
| Total investments | $ 6,888 |
| X | ||||||||||
- Definition Amount of investment in marketable security. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of investment in marketable security, classified as current. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Amount of investment in marketable security, classified as noncurrent. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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