Consolidated Statements of Cash Flows (Unaudited) - USD ($)	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Cash flows from operating activities
Net income	$ 889,300	$ 589,300
Adjustments to reconcile net income to net cash used in operating activities:
Depreciation	800
Contributed services		112,400
Changes in allowance for doubtful accounts	5,400	1,600
Gain on sale of patents	(269,800)
Unrealized gain from marketable securities	(173,400)
Changes in operating assets and liabilities:
Accounts receivable	(45,000)	(126,400)
Prepaid expenses and other current assets	1,200	11,400
Accounts payable and accrued expenses	(60,500)	(7,800)
Deferred revenue	(139,200)	(354,500)
Net cash provided by operating activities	208,800	226,000
Cash flows from investing activities
Purchase of marketable securities	(290,500)
Proceeds from sale of patents	269,800
Purchase of property and equipment	(3,400)
Net cash used by investing activities	(24,100)
Cash flows from financing activities
Proceeds from rights offering		2,599,800
Issuance cost for rights offering		(119,400)
Net cash provided by financing activities		2,480,400
Net change in cash	184,700	2,706,400
Cash, beginning of the period	4,375,300	1,541,900
Cash, end of the period	4,560,000	4,248,300
Supplemental disclosure of cash flow information:
Income taxes paid		7,500
Supplemental disclosure of non-cash investing and financing information:
Non-cash financing activities: shares issued for settlement of accrued expenses		$ 39,600