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Summary of Significant Accounting Policies (Details 2) - USD ($)	Sep. 30, 2021	Dec. 31, 2020
Gross property and equipment	$ 884,000	$ 4,238,000
Accumulated depreciation and amortization	(770,000)	(4,163,000)
Net property and equipment	114,000	75,000
Production Tooling, Machinery and Equipment
Gross property and equipment	26,000	2,349,000
Office Furniture and Fixtures
Gross property and equipment	95,000	425,000
Computer Equipment and Software
Gross property and equipment	740,000	1,447,000
Leasehold improvements
Gross property and equipment	19,000
Construction in-Progress
Gross property and equipment	$ 4,000	$ 17,000

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Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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