Note R - Business Acquisition - Assets Acquired and Liabilities Assumed (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019	Jul. 23, 2019
GOODWILL	$ 15,317,000	$ 15,317,000
OneEvent Technologies, Inc. [Member]
Cash			$ 287,000
Receivables			14,000
Inventory			307,000
Other current assets			105,000
Property, plant and equipment			35,000
Intangibles			2,141,000
GOODWILL			3,831,000
Right-of-Use Lease Assets			59,000
Total assets acquired			6,779,000
Less: Current liabilities assumed			255,000
Lease Liability - Noncurrent			23,000
Net assets acquired			$ 6,501,000