Statements of Cash Flows (Unaudited) - USD ($)	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Cash flows from operating activities:
Net (loss) income	$ (62,255)	$ 77,084
Adjustments to reconcile net (loss) income to net cash (used in) operating activities:
Depreciation and amortization	72,005	51,771
Deferred tax expense (benefit)	7,638	(15,805)
Share-based compensation expense	7,323	9,078
Changes in assets and liabilities:
(Increase) in receivables on government contracts	(154,194)	(146,432)
(Increase) in prepaid expenses and other current assets	(82,377)	(44,468)
Increase (decrease) in accrued payroll and payroll taxes	27,098	(327,432)
Increase (decrease) in accounts payable and accrued expenses	34,845	(80,210)
(Decrease) in accrued warranty expense		(47,173)
Increase (decrease) in deferred revenue	48,500	(5,977)
(Decrease) in long-term liabilities	(1,610)	(1,542)
Net cash used in operating activities	(103,027)	(531,106)
Cash flows from investing activities:
Payments related to intangible assets	(843)	(232)
Purchase of property and equipment	(3,974)	(27,984)
Net cash used in investing activities	(4,817)	(28,216)
Cash flows from financing activities:
Proceeds from term loan	753,300
Repayment of term loan	(753,300)
Borrowings from line of credit-bank	260,000
Exercise of stock options		4,000
Net cash provided by financing activities	260,000	4,000
Net increase (decrease) in cash and cash equivalents	152,156	(555,322)
Cash and cash equivalents, beginning of period	1,621,309	2,206,749
Cash and cash equivalents, end of period	$ 1,773,465	$ 1,651,427