Inventory (Details) - USD ($)	Mar. 31, 2023	Dec. 31, 2022
Inventory
Raw materials	$ 0	$ 444,000
Work in process	0	110,000
Finished goods	0	60,000
Allowance for slow moving and obsolete inventory	0	(235,000)
Inventory, net	$ 0	$ 379,000

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Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer.

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Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Amount before valuation and LIFO reserves of raw materials expected to be sold, or consumed within one year or operating cycle, if longer.

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Amount of valuation reserve for inventory.

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Amount before valuation and LIFO reserves of merchandise or goods in the production process expected to be completed within one year or operating cycle, if longer.

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