Statements of Income (Unaudited) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Contract revenues	$ 1,017,121	$ 1,893,945	$ 4,890,889	$ 6,626,716
Cost of sales	317,015	776,493	1,887,708	3,055,932
Gross margin	700,106	1,117,452	3,003,181	3,570,784
Expenses:
Engineering	691,337	648,739	2,049,425	1,882,829
General and administrative	349,230	413,731	1,182,537	1,287,668
Total expenses	1,040,567	1,062,470	3,231,962	3,170,497
(Loss) income from operations	(340,461)	54,982	(228,781)	400,287
Other income:
Interest income	898	322	3,569	1,238
(Loss) income before income taxes	(339,563)	55,304	(225,212)	401,525
Income tax benefit (expense)	130,031	(18,275)	92,764	(127,364)
Net (loss) income available to common shareholders	$ (209,532)	$ 37,029	$ (132,448)	$ 274,161
(Loss) income per common share - basic (in dollars per share)	$ (0.01)			$ 0.01
Basic weighted average number of shares outstanding (in shares)	35,588,775	35,568,775	35,578,519	35,308,668
(Loss) income per common share - diluted (in dollars per share)	$ (0.01)			$ 0.01
Diluted weighted average number of shares outstanding (in shares)	35,588,775	35,876,540	35,578,519	35,594,805