Consolidated Balance Sheets - USD ($)	Mar. 31, 2021	Dec. 31, 2020
Current assets
Cash and cash equivalents	$ 4,392,800	$ 4,375,300
Marketable securities	256,800
Accounts receivable, net	557,000	417,300
Prepaid expenses and other current assets	70,800	48,500
Total current assets	5,277,400	4,841,100
Property and equipment, net	3,200
Other assets	17,800	17,800
Total assets	5,298,400	4,858,900
Current liabilities
Accounts payable	242,500	251,000
Accrued expenses	68,900	82,000
Accrued wages	145,500	141,600
Deferred revenue	1,150,400	1,084,900
Total current liabilities	1,607,300	1,559,500
Long-term liabilities
Deferred revenue	395,500	383,000
Total liabilities	2,002,800	1,942,500
Commitments and contingencies
Stockholders' equity
Preferred stock, $0.01 par value, 5,000,000 shares authorized, no shares issued and outstanding as of March 31, 2021 or December 31, 2020
Common stock, $0.0001 par value, 195,000,000 shares authorized, 18,850,675 shares issued and outstanding for both periods ending March 31, 2021 and December 31, 2020	1,900	1,900
Additional paid-in capital	82,155,200	82,155,200
Accumulated deficit	(78,861,500)	(79,240,700)
Total stockholders' equity	3,295,600	2,916,400
Total liabilities and stockholders' equity	$ 5,298,400	$ 4,858,900