Annual report pursuant to Section 13 and 15(d)

Business Segment, Business Credit Risks and Concentration - Business Segments (Details)

v3.19.1
Business Segment, Business Credit Risks and Concentration - Business Segments (Details)
12 Months Ended
Dec. 31, 2018
USD ($)
Segment
Dec. 31, 2017
USD ($)
Segment Reporting [Abstract]    
Number of operating segments | Segment 2  
Segment Reporting Information [Line Items]    
Total revenue $ 138,148,842 $ 113,953,519
Total operating expenses 130,585,138 103,768,229
Total operating income 7,563,704 10,185,290
Total other expenses, net (739,007) (575,918)
Income before income taxes 6,824,697 9,609,372
Identifiable Assets 112,548,475 93,631,940
Capital Expenditures 19,609,245 10,301,721
Depreciation and Amortization 8,436,972 7,217,901
Operating Segments | Electrical construction    
Segment Reporting Information [Line Items]    
Total revenue 136,526,511 109,154,476
Total operating expenses 123,914,953 95,463,721
Total operating income 12,611,558 13,690,755
Total other expenses, net (761,117) (562,233)
Income before income taxes 11,850,441 13,128,522
Identifiable Assets 93,642,412 78,745,673
Capital Expenditures 19,514,124 10,191,515
Depreciation and Amortization 8,319,362 7,086,361
Operating Segments | Real estate development    
Segment Reporting Information [Line Items]    
Total revenue 1,622,331 4,799,043
Total operating expenses 1,924,835 4,177,558
Total operating income (302,504) 621,485
Total other expenses, net (56,010) (71,945)
Income before income taxes (358,514) 549,540
Identifiable Assets 16,444,209 8,713,310
Capital Expenditures 42,545 1,065
Depreciation and Amortization 21,279 15,207
Corporate    
Segment Reporting Information [Line Items]    
Total operating expenses 4,745,350 4,126,950
Total operating income (4,745,350) (4,126,950)
Total other expenses, net 78,120 58,260
Income before income taxes (4,667,230) (4,068,690)
Identifiable Assets 2,461,854 6,172,957
Capital Expenditures 52,576 109,141
Depreciation and Amortization $ 96,331 $ 116,333