Note 9 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2021

Notes Tables

Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]

	2021		2020
Current:
Federal	$	14,978	$	(1,528,305	)
State		13,399		950
Total current tax provision		28,377		(1,527,355	)
Deferred:
Federal		-		-
State		---		---
Total deferred tax provision		-		-
Income tax expense / (benefit)	$	28,377	$	(1,527,355	)

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

	2021			2020
Deferred income tax assets:
Allowance for doubtful accounts	$	12,926		$	35,442
Inventory capitalization		6,620			6,969
Impairment Charge		722,720			712,683
Research & development tax credits		1,671,893			1,719,598
Compensation costs		148,958			211,363
Vacation accrual		141,079			89,626
Interest expense carryforward		-			223,768
Net operating loss carryforward		808,163			925,912
Other items		94,235			12,248
Total deferred tax asset		3,606,594			3,937,609
Deferred incomes tax liability:
Property and equipment - tax over book depreciation		(616,501	)		(556,476	)
Less valuation allowance		(2,990,093	)		(3,381,133	)
Net long-term deferred tax asset	$	-		$	-

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

	2021			2020
Expected provision at federal statutory tax rate (21%)	$	1,002,721		$	(1,596,485	)
PPP loan forgiveness		(513,118	)		-
Provision for valuation allowance		(346,209	)		883,796
Foreign tax (income) loss		(115,863	)		70,492
Net operating loss carryback		-			(1,527,355	)
State taxes, net of federal benefit		5,787			(36,832	)
Federal research & development credit		(56,761	)		(64,266	)
Other permanent differences		51,820			743,295
Income (benefit) / tax expense	$	28,377		$	(1,527,355	)