Note G - Intangible Assets - Schedule of Intangible Assets (Details) - USD ($)		Jun. 30, 2022	Mar. 31, 2021
Finite-lived intangible assets, accumulated amortization		$ 1,895,000	$ 1,526,000
Total intangible assets		10,025,000	9,756,000
Contract [Member]
Indefinite-lived intangible assets	[1]	3,160,000	3,160,000
Leases, Acquired-in-Place [Member]
Finite-lived intangible assets		2,564,000	2,398,000
Finite-lived intangible assets, accumulated amortization		1,459,000	1,311,000
Lease Commissions [Member]
Finite-lived intangible assets		165,000	152,000
Finite-lived intangible assets, accumulated amortization		93,000	82,000
Technology-Based Intangible Assets [Member]
Finite-lived intangible assets		4,136,000	4,046,000
Finite-lived intangible assets, accumulated amortization		$ 343,000	$ 133,000

[1] Indefinite-Lived in-place contract includes the 2nd Street, LLC property in Miami, FL acquired on November 3, 2021. Refer to Note D - Acquisitions and Dispositions of Investments in Real Estate.