Quarterly report pursuant to Section 13 or 15(d)

Uncompleted Contracts - Schedule of Uncompleted Contracts (Details)

v3.20.2
Uncompleted Contracts - Schedule of Uncompleted Contracts (Details) - USD ($)
Sep. 30, 2020
Dec. 31, 2019
Contractors [Abstract]    
Revenue recognized $ 1,387,800 $ 1,074,800
Less: billings to date (1,078,200) (832,300)
Costs and estimated earnings in excess of billings on uncompleted contracts 309,600 242,500 [1]
Billings to date 576,700 2,707,200
Revenue recognized (264,600) (2,380,100)
Revenue contract liabilities $ 312,100 $ 327,100 [1]
[1] These numbers were derived from the audited financial statements for the year ended December 31, 2019.