Statements of Cash Flows (Unaudited) - USD ($)	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Operating Activities
Net income	$ 157,300	$ 123,400
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization	12,700	9,100
Deferred income taxes		(47,400)
Other assets	209,900	211,500
Other liabilities	(35,100)	(33,900)
Net income adjusted for non-cash operating activities	344,800	262,700
(Increase) decrease in assets
Accounts receivable	311,700	210,800
Inventory	(161,700)	(149,600)
Prepaid and other	68,400	39,900
Increase (decrease) in liabilities
Accounts payable and accrued expenses	37,300	26,700
Taxes on income	(26,100)	5,200
Total increase in operating capital	229,600	133,000
Net cash provided by operating activities	574,400	395,700
Investing Activities
Additions to fixed assets	(31,600)	(31,000)
Net cash used in investing activities	(31,600)	(31,000)
Financing Activities
Exercise of warrants	2,800
Net cash provided by financing activities	2,800
Increase in cash	545,600	364,700
Cash at beginning of year	1,362,800	688,000
Cash at end of period	1,908,400	1,052,700
Supplemental Disclosure of Non Cash Investing Activities
Accumulated depreciation and amortization	600	500
Furniture, fixtures and equipment	$ (600)	$ (500)