Balance Sheets (Current Period Unaudited) - USD ($)	Mar. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 1,616,834	$ 2,206,749
Receivables on government contracts	1,301,712	1,043,738
Prepaid expenses and other current assets	74,621	94,717
Total current assets	2,993,167	3,345,204
Property and equipment:
Operating lease-right of use asset	470,648
Equipment	388,638	357,796
Leasehold improvements	21,306	21,306
Furniture & fixtures	43,174	43,174
Less: accumulated depreciation	(124,698)	(109,484)
Property and equipment, net	770,558	312,792
Intangible assets	140,428	140,428
Less: accumulated amortization	(80,529)	(75,241)
Intangible assets, net	59,899	65,187
Deferred tax assets	37,707	34,623
Total assets	3,861,331	3,757,806
Current liabilities:
Accrued payroll and payroll taxes	559,269	868,618
Accounts payable and accrued expenses	204,419	308,415
Accrued warranty expense	146,950	153,723
Lease obligation, current portion	119,880
Deferred revenue	37,221	39,824
Total current liabilities	1,067,739	1,370,580
Lease obligation, net of current portion	340,581
Other long-term liabilities		19,560
Total liabilities	1,408,320	1,390,140
Shareholders' equity:
Preferred stock, convertible, par value $.01 per share, authorized 5,000,000 shares, none issued and outstanding
Common stock, par value $.01 per share, authorized 60,000,000 shares, issued and outstanding 35,568,775 and 35,568,775 shares, respectively	355,689	355,689
Capital in excess of par value	10,110,883	10,106,344
Accumulated deficit	(8,013,561)	(8,094,367)
Total shareholders' equity	2,453,011	2,367,667
Total liabilities and shareholders' equity	$ 3,861,331	$ 3,757,806