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Note 8 - Lines of Credit (Details) - Diamond Bar [Member] - Line of Credit [Member] - USD ($)
 3 Months Ended 9 Months Ended
Sep. 19, 2017
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Dec. 31, 2018
Note 8 - Lines of Credit (Details) [Line Items]            
Line of Credit Facility, Maximum Borrowing Capacity $ 8,000,000          
Line of Credit Facility, Expiration Date Jun. 01, 2019          
Line of Credit Facility, Interest Rate at Period End   5.50%   5.50%    
Line of Credit Facility, Collateral       The line of credit was secured by all of the assets of Diamond Bar and is guaranteed by Nova LifeStyle.    
Long-term Line of Credit   $ 0   $ 0   $ 6,248,162
Interest Expense, Debt   $ 0 $ 36,696 $ 35,444 $ 92,524  
Line of Credit Facility, Covenant Terms       The Diamond Bar loan had the following covenants: (i) maintain a minimum tangible net worth of not less than $20 million; (ii) maintain a ratio of debt to tangible net worth not in excess of 2.5 to 1.0; (iii) the pre-tax income must be not less than 1% of total revenue quarterly; and (iv) maintain a current ratio in excess of 1.25 to 1.00.    
Line of Credit Facility, Covenant Compliance         Diamond Bar was in compliance with the stated covenants.