Condensed Consolidated Balance Sheets (Unaudited) (Parentheticals) - USD ($) $ in Thousands	Sep. 30, 2019	Mar. 31, 2019
Statement of Financial Position [Abstract]
Accounts receivable, allowance for doubtful accounts	$ 382	$ 408
Assets on lease, accumulated depreciation	6,007	6,689
Property and equipment, accumulated depreciation	3,935	3,470
Intangible assets, accumulated amortization	$ 2,229	$ 2,097
Preferred stock, par value (in dollars per share)	$ 1	$ 1
Preferred stock, shares authorized (in shares)	50,000	50,000
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)	3,022,745	2,022,637
Common stock, shares outstanding (in shares)	3,022,745	2,022,637