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Note H - Investment in Unconsolidated Subsidiaries - Summarized Financial Information (Unaudited) of Milestone China (Details) - USD ($)
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Cost of goods sold $ 4,312,507 $ 4,175,533
Gross Profit 6,969,379 6,306,472
Net Losses (5,369,553) (7,294,489)
Milestone China [Member]    
Current assets 13,127,422 9,362,198
Non-current assets 3,213,520 2,467,547
Total assets: 16,340,942 11,829,745
Current liabilities 18,468,937 9,900,611
Stockholders' equity (2,127,995) 1,929,134
Total liabilities and stockholders’ equity 16,340,942 11,829,745
Net sales 1,666,605 1,126,484
Cost of goods sold 477,200 976,106
Gross Profit 1,189,405 150,378
Other Expenses (6,247,205) (2,834,980)
Net Losses $ (5,057,800) $ (2,684,602)