Condensed Consolidated Balance Sheets (Unaudited) (Parentheticals) - USD ($) $ in Thousands	Sep. 30, 2022	Mar. 31, 2022
Statement of Financial Position [Abstract]
Accounts receivable, allowance for doubtful accounts	$ 1,328	$ 1,368
Assets on lease, accumulated depreciation	1,041	780
Property and equipment, accumulated depreciation	6,015	5,405
Intangible assets, accumulated amortization	$ 3,512	$ 2,947
Preferred stock, par value (in dollars per share)	$ 1.00	$ 1.00
Preferred stock, shares authorized (in shares)	2,000,000	2,000,000
Common stock par value (in dollars per share)	$ 0.25	$ 0.25
Common stock, shares authorized (in shares)	4,000,000	4,000,000
Common stock, shares issued (in shares)	3,026,495	3,022,745
Common stock, shares outstanding (in shares)	2,850,748	2,866,418
Treasury stock (in shares)	175,747	156,327
Treasury stock average price (in dollars per share)	$ 19.07	$ 19.20