CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)	Dec. 31, 2022	Dec. 31, 2021
CONSOLIDATED BALANCE SHEETS
Accounts receivable, net of allowance	$ 42,000	$ 61,000
Notes receivable, net of allowance	$ 0	$ 43,108
Preferred stock, par value (in dollars per share)	$ 0	$ 0
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	1,180	1,180
Preferred stock, shares outstanding	1,180	1,180
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares issued	118,664,094	89,551,993
Common stock, shares outstanding	118,664,094	89,551,993