Note 12 - Income Taxes (Tables)

12 Months Ended

Sep. 30, 2017

Notes Tables

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

	201 7			201 6			201 5
Income (Loss) Before Provision for (Recovery of) Income Taxes	$	2,188,760		$	1,333,248		$	(122,377	)
Statutory rate		34	%		34	%		34	%
Tax at statutory rate		744,178			453,304			(41,608	)
Permanent differences		5,465			1,000			900
Research and development and other credits - net		(77,220	)		(47,400	)		(48,500	)
Valuation allowance		-			(3,681,100	)		82,200
State Tax		130,560			-			-
State Net Operating Loss		(174,223	)		-			-
Transaction Costs		95,849			-			-
Other		55,755			(25,404	)		7,008
Provision for ( recovery of) income taxes	$	780,364		$	(3,299,600	)	$	-

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

	201 7			201 6
Inventories	$	291,338		$	302,600
Bad debts		21,171			3,400
Accrued liabilities		88,817			77,700
Prepaid expense		(73,120	)		(8,900	)
Depreciation and amortization		220,967			93,000
Research and development and other credit carryforwards		2,179,462			2,019,700
Net operating loss carryforward		520,087			1,303,000
Directors stock option plan		41,537			40,100
Net deferred tax asset		3,290,259			3,830,600
Valuation allowance		(500,000	)		(500,000	)
Total	$	2,790,259		$	3,330,600

Summary of Operating Loss Carryforwards [Table Text Block]

Tax Year Expires	NOLS		R& D & Other Credits
2018	$	-	$	44,980
2019		-		166,019
2020		-		190,072
2021		-		126,620
2022		-		48,573
2023		-		107,172
2024		-		156,392
2025		-		155,394
2026		-		139,885
2027		-		154,991
2028		-		152,732
2029		-		68,676
2030		-		31,081
2031		302,190		44,712
2032		999,973		59,085
2033		1,155,716		71,062
2034		472,315		73,198
2035		99,688		76,429
2036		-		73,315
2037		-		117,000
2 038 and beyond		-		114,074
	$	3,029,882	$	2,179,462