Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) (Unaudited) - USD ($)
 3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Income Statement [Abstract]        
Revenue $ 3,770,723 $ 2,569,408 $ 5,534,678 $ 5,498,681
Cost of revenue 2,620,925 2,405,860 4,190,441 4,678,603
Gross profit 1,149,798 163,548 1,344,237 820,078
Operating expenses:        
Selling expenses 727,642 505,866 1,053,737 984,557
General and administrative expenses 322,445 334,550 711,004 763,367
Research and development expenses 30,044 66,008 78,863 135,926
Bad debt (benefit) expense (5,318) 10,092 24,928 23,404
Total operating expenses 1,074,813 916,516 1,868,532 1,907,254
Income (loss) from operations 74,985 (752,968) (524,295) (1,087,176)
Other income (expense):        
Interest income 1,212 12,119 1,598 15,376
Interest expense (63,144) (97,254) (125,147) (184,034)
Net other expense (61,932) (85,135) (123,549) (168,658)
Income (loss) before income taxes 13,053 (838,103) (647,844) (1,255,834)
Income tax expense
Net income (loss) 13,053 (838,103) (647,844) (1,255,834)
Other comprehensive income - foreign currency translation adjustment 5,796 (811,164) (191,236) 24,701
Comprehensive income (loss) $ 18,849 $ (1,649,267) $ (839,080) $ (1,231,133)
Earnings (loss) per share:        
Basic and diluted $ 0 $ (0.02) $ (0.01) $ (0.03)
Weighted average shares outstanding 43,579,557 43,579,557 43,579,557 43,579,557