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Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Deferred tax assets:
Net operating loss carryforwards	$ 4,330,000	$ 4,546,000
Credits	948,000	1,014,000
Capitalized research and development costs
Other acquired intangibles	37,000
Accruals not currently deductible	597,000	685,000
Depreciation	140,000	58,000
Total deferred tax assets	6,052,000	6,303,000
Valuation allowance for deferred tax assets	(545,000)	(626,000)
Net deferred tax assets	5,507,000	5,677,000
Deferred tax liability:
Acquired intangibles		(170,000)
Net deferred tax assets	$ 5,507,000	$ 5,507,000

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