Statements of Income - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Contract revenues	$ 6,366,226	$ 8,561,346
Cost of sales	2,279,823	3,602,555
Gross margin	4,086,403	4,958,791
Expenses:
Engineering	2,547,007	2,712,810
General and administrative	1,478,046	1,752,768
Total expenses	4,025,053	4,465,578
Income from operations	61,350	493,213
Other income:
Interest income	4,503	2,731
Income before income taxes	65,853	495,944
Income tax expense	35,321	166,734
Net income available to common shareholders	$ 30,532	$ 329,210
Income per common share - basic (in dollars per share)		$ 0.01
Basic weighted average number of shares outstanding (in shares)	35,588,775	35,308,668
Income per common share - diluted (in dollars per share)		$ 0.01
Diluted weighted average number of shares outstanding (in shares)	35,629,951	35,589,877