CONSOLIDATED BALANCE SHEETS (Parentheticals) - USD ($)	Dec. 31, 2023	Dec. 31, 2022
Current liabilities
Deferred revenue, customer deposits	$ 1,891,000	$ 1,786,000
Equity:
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	1,500,000,000	1,500,000,000
Common stock, shares issued (in shares)	11,985,268	4,781,930
Common stock, shares outstanding (in shares)	11,985,268	4,781,930
Series A Preferred Stock
Convertible redeemable preferred stock:
Convertible redeemable preferred stock, issued (in shares)	7,000,000	7,000,000
Convertible preferred shares outstanding (in shares)	7,000,000	7,000,000
Convertible redeemable preferred stock, Series A liquidation and deemed liquidation preference	$ 3,500,000,000	$ 3,500,000,000
Series B Preferred Stock
Convertible redeemable preferred stock:
Convertible redeemable preferred stock, shares authorized (in shares)	60,000,000	60,000,000
Convertible redeemable preferred stock, issued (in shares)	20,000,000	10,000,000
Convertible preferred shares outstanding (in shares)	2,105,200	10,000,000
Series C Preferred Stock
Convertible redeemable preferred stock:
Convertible redeemable preferred stock, shares authorized (in shares)	2,000,000	2,000,000
Convertible redeemable preferred stock, issued (in shares)	1,159,210	0
Convertible preferred shares outstanding (in shares)	613,039	0