Note 7 - Short Term Investments	6 Months Ended
Sep. 30, 2022
Notes to Financial Statements
Investment [Text Block]	NOTE 7 — SHORT TERM INVESTMENTS At both September 30, 2022 and March 31, 2022, the Company held short term investments in deposits totaling nil. The Company held $25.2 million in deposits which were classified as cash equivalents as of September 30, 2022 and $22.0 million of such deposits as of March 31, 2022.

The entire disclosure for investment.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 321
-URI https://asc.fasb.org/topic&trid=75115024

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-URI https://asc.fasb.org/topic&trid=2196928

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 325
-URI https://asc.fasb.org/topic&trid=2197064

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-URI https://asc.fasb.org/topic&trid=2196965

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