Note F - Investment in and Transactions with Unconsolidated Subsidiaries - Summarized Financial Information (Unaudited) of Milestone China (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Current liabilities	$ 17,910,452	$ 17,696,393
Stockholders' deficit	(4,435,281)	(2,504,900)
Total liabilities and stockholders’ deficit	13,475,171	15,191,493
Net sales	3,401,025	1,710,473
Cost of goods sold	1,724,882	789,957
Gross profit	1,676,143	920,516
Other expenses	(3,996,663)	(1,371,085)
Net loss	(2,320,520)	(450,569)
Milestone China [Member]
Current assets	8,392,858	10,587,648
Non-current assets	5,082,313	4,603,845
Total assets:	$ 13,475,171	$ 15,191,493