CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (Parentheticals) - USD ($) $ in Thousands	Jun. 30, 2023	Mar. 31, 2023
Statement of Financial Position [Abstract]
Accounts receivable, allowance for doubtful accounts	$ 1,295	$ 1,160
Assets on lease, accumulated depreciation	38	223
Property and equipment, accumulated depreciation	6,946	6,624
Intangible assets, accumulated amortization	$ 4,493	$ 4,191
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	3,026,495
Common stock, shares outstanding (in shares)	2,817,754	2,818,374
Treasury stock (in shares)	208,741	208,121
Treasury stock average price (in dollars per share)	$ 19.63	$ 19.62