Note 5 - Computation of Net Loss Per Common Share (Details Textual) - shares	3 Months Ended		6 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)	535,001	1,036,206	479,341	1,036,206
Performance-based Restricted Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)	526,333		469,667
Share-Based Payment Arrangement [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)	652
Employee Stock Purchase Plan [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)	8,016		9,348
Share-Based Payment Arrangement, Option [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)		36,206	326	36,206
Shares Tied to Derivative Liability [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)		1,000,000		1,000,000