Note 7 - Fair Value Measurements - Assets and Liabilities Carried at Fair Value on a Recurring Basis (Details) - Fair Value, Recurring [Member] - Reported Value Measurement [Member] - USD ($) $ in Thousands	Jun. 30, 2025	Mar. 31, 2025
Cash equivalents	$ 175,654	$ 51,230
Short-term Cash Instruments [Member]
Short-term cash instruments	1,401	1,404
Fair Value, Inputs, Level 1 [Member]
Cash equivalents	175,654	51,230
Fair Value, Inputs, Level 1 [Member] \| Short-term Cash Instruments [Member]
Short-term cash instruments	0	0
Fair Value, Inputs, Level 2 [Member]
Cash equivalents	0	0
Fair Value, Inputs, Level 2 [Member] \| Short-term Cash Instruments [Member]
Short-term cash instruments	1,401	1,404
Fair Value, Inputs, Level 3 [Member]
Cash equivalents	0	0
Fair Value, Inputs, Level 3 [Member] \| Short-term Cash Instruments [Member]
Short-term cash instruments	$ 0	$ 0

- Definition

Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

+ References + Details

AMERICAN SUPERCONDUCTOR CORP /DE/ 10-Q