Condensed Consolidated Balance Sheets (Unaudited) (Parentheticals) - USD ($) shares in Thousands, $ in Thousands	Sep. 30, 2025	Mar. 31, 2025
Allowance for credit loss	$ 1	$ 2
Preferred stock, par value (in dollars per share)	$ 0	$ 0
Preferred stock, authorized (in shares)	5,000	5,000
Preferred stock, issued (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01
Common stock, authorized (in shares)	50,000	50,000
Common stock, issued (in shares)	12,716	12,674
Common stock, outstanding (in shares)	6,755	6,696
Common Stock, No par (in dollars per share)		$ 0
Treasury, shares (in shares)	5,961	6,020