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Condensed Statements of Operations and Comprehensive Income (Unaudited) - USD ($)
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Contract Revenues $ 1,754,973 $ 987,929
Cost of sales 651,536 324,328
Gross margin 1,103,437 663,601
Expenses:    
General and administrative 408,903 336,148
Total expenses 926,083 660,061
Income from operations 177,354 3,540
Other income:    
Interest 728 1,449
Net income before income taxes 178,082 4,989
Income tax expense 87,775 3,143
Net income available to common shareholders $ 90,307 $ 1,846
Income per common share - basic (in dollars per share)
Basic weighted average number of shares outstanding (in shares) 35,430,119 32,030,138
Income per common share - diluted (in dollars per share)
Diluted weighted average number of shares outstanding (in shares) 35,643,392 35,608,255
Engineering [Member]    
Expenses:    
Engineering $ 517,180 $ 323,913