CONDENSED STATEMENTS OF CASH FLOWS - USD ($)	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Cash flows from operating activities:
Net income (loss)	$ 510,422	$ (169,427)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Deferred income taxes	(535)	(203,657)
Depreciation and amortization	131,016	107,805
Operating lease right-to-use asset, net	14,652	18,434
Stock-based compensation	26,390	30,456
Changes in operating assets and liabilities:
Accounts receivable	(387,939)	17,895
Other current assets	(215,261)	(248,805)
Other assets	43,282	2,273
Unexpired subscription revenue	287,115	748,936
Accounts payable	51,826	(50,131)
Accrued expenses	(135,409)	(66,334)
Net cash provided by operating activities	325,559	187,445
Cash flows from investing activities:
Sale of available-for-sale securities - municipal bonds	458,237	0
Purchase of property and equipment	(182,734)	(69,131)
Net cash provided by (used in) investing activities	275,503	(69,131)
Cash flows from financing activities:
Proceeds from bank loan	0	1,561,500
Net cash provided by financing activities	0	1,561,500
Net increase in cash and cash equivalents	601,062	1,679,814
Cash and cash equivalents at beginning of period	10,302,732	8,275,836
Cash and cash equivalents at end of period	$ 10,903,794	$ 9,955,650