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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

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