Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Deferred tax assets:
Net operating loss carryforwards	$ 4,546,000	$ 4,849,000
Credits	1,014,000	942,000
Capitalized research and development costs
Other acquired intangibles		6,000
Accruals not currently deductible	685,000	648,000
Depreciation	58,000	75,000
Total deferred tax assets	6,303,000	6,520,000
Valuation allowance for deferred tax assets	(626,000)	(569,000)
Net deferred tax assets	5,677,000	5,951,000
Deferred tax liability:
Acquired intangibles	(170,000)	(170,000)
Net deferred tax assets	$ 5,507,000	$ 5,781,000

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