Quarterly report pursuant to Section 13 or 15(d)

Contract Assets and Contract Liabilities (Details 1)

v3.20.2
Contract Assets and Contract Liabilities (Details 1) - USD ($)
Jun. 30, 2020
Dec. 31, 2019
Costs and estimated earnings amounts on uncompleted contracts included in balance sheets    
Contract assets $ 11,830 $ 106,015
Contract liabilities (148,851) (168,957)
Net contract liabilities $ (137,021) $ (62,942)