Note 12 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2018

Notes Tables

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

	Three Months			Year			Fiscal Year
	December 31, 2017			December 31, 2018			September 30, 2017
Income Before Provision for Income Taxes	$	1,177,991		$	5,281,730		$	2,188,760
Statutory rate		34	%		21	%		34	%
Tax at statutory rate		400,517			1,109,163			744,178
Permanent differences		2,055			196,142			5,465
Research and development and other credits - net		-			-			(77,220	)
Valuation allowance		(452,681	)		-			-
State Tax		25,654			79,165			130,560
State Net Operating Loss		-			-			(174,223	)
Transaction Costs		-			-			95,849
Deferred Adjustments - change in tax rates		290,965			-			-
Change in Reserve for uncertain tax positions		395,000			-			-
Return to Provision Adjustments and Other		6,219			283,550			55,755
Provision for income taxes	$	667,729		$	1,668,020		$	780,364

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

	December 31, 2018			December 31, 2017
Inventories	$	145,844		$	116,673
Bad debts		8,773			13,799
Accrued liabilities		281,475			140,280
Prepaid expense		(95,371	)		(59,085	)
Depreciation and amortization		(2,928,232	)		166,798
Research and development and other credit carryforwards		1,266,043			2,150,820
Net operating loss carryforward		-			59,852
Directors stock option plan		62,134			27,074
Total deferred tax asset (liability)		(1,259,334	)		2,616,211
Valuation allowance		(47,319	)		(47,319	)
Reserve for uncertain tax positions		(395,000	)		(395,000	)
Total reserves & allowances		(442,319	)		(442,319	)
Net deferred tax asset (liability)	$	(1,701,653	)	$	2,173,892

Summary of Operating Loss Carryforwards [Table Text Block]

Tax Year Expires	State Credits		R& D & Other Credits
2019	$	-	$	2,319
2020		-		3,000
2021		-		3,000
2022		-		3,000
2023		-		3,000
2024		-		3,000
2025		-		3,000
2026		-		86,366
2027		-		152,732
2028		-		68,676
2029		-		31,081
2030		-		44,712
2031		-		59,085
2032		-		71,062
2033		-		73,198
2034		38,127		76,429
2035		111,708		73,315
2036 and beyond		359,233		-
	$	509,068	$	756,975