Accrued Expenses (Details) - USD ($)	Mar. 31, 2023	Dec. 31, 2022
Accrued Expenses
Accounting fees	$ 16,000	$ 87,000
Other current liabilities	0	90,000
Accrued expenses	338,000	514,000
Interest payable	20,000	39,000
Accounts receivable credit balances	0	1,000
Sales tax payable	188,000	188,000
Deferred compensation	$ 114,000	$ 109,000