Note 1 - Significant Accounting Policies (Tables)

12 Months Ended

Mar. 31, 2023

Notes Tables

Allowance for Sales and Marketing Expenses [Table Text Block]

Balance at March 31, 2021	$	91
additions		440
usages		(473	)
adjustments		18
Balance at March 31, 2022	$	76
additions		319
usages		(248	)
adjustments		(45	)
Balance at March 31, 2023	$	102

Schedule of Other Nonoperating Income (Expense) [Table Text Block]

	2023			2022
	(In thousands)
Interest expense	$	(10	)	$	(11	)
Interest income		712			68
Interest income, net	$	702		$	57