Income Taxes (Tables)

12 Months Ended

Sep. 30, 2019

Income Tax Disclosure [Abstract]

Schedule of Components of Income (Loss) Before Provision for Income Taxes

The following note related to income taxes includes both continuing and discontinued operations. The components of income (loss) before provision for income taxes are as follows (in thousands):

	Years Ended September 30,
	2019			2018			2017
Domestic	$	916		$	7,845		$	1,900
Foreign		(4,648	)		(2,320	)		7,930
	$	(3,732	)	$	5,525		$	9,830

The components of the provision for income taxes are as follows (in thousands):

	Years Ended September 30,
	2019		2018			2017
Current:
Domestic federal	$	—	$	1,167		$	54
Foreign		1,278		(1,404	)		1,330
Foreign withholding taxes		94		356			240
Domestic state		58		101			120
Total current		1,430		220			1,744
Deferred:
Domestic federal		—		—			—
Total deferred		—		—			—
Total provision	$	1,430	$	220		$	1,744

Schedule of Reconciliation of Actual Income Taxes to Income Taxes at Expected United States Federal Corporate Income Tax Rate

A reconciliation of actual income taxes to income taxes at the expected United States federal corporate income tax rate is as follows (in thousands, except percentages):

	Years Ended September 30,
	2019			2018			2017
Federal statutory rate		21.0	%		24.3	%		34.0	%
Tax (benefit) expense at the federal statutory rate	$	(784	)	$	1,342		$	3,340
Effect of permanent book-tax differences		272			75			340
State tax provision		31			76			100
Valuation allowance for net deferred tax assets		1,682			617			(1,610	)
Uncertain tax items		74			(3,013	)		350
Tax rate differential		150			1,107			(776	)
Other items		5			16			—
	$	1,430		$	220		$	1,744

Schedule of Components of Deferred Tax Assets and Deferred Tax Liabilities

The components of deferred tax assets and deferred tax liabilities are as follows (in thousands):

	September 30, 2019			September 30, 2018
Deferred tax assets (liabilities):
Capitalized inventory costs	$	168		$	193
Inventory write-downs		2,856			1,333
Accrued warranty		161			204
Deferred profits		346			1,006
Accruals and reserves not currently deductible		3,531			5,017
Stock option expense		849			738
Federal net operating loss carryforwards		6,979			2,922
Foreign and state net operating losses		10,481			13,860
Book vs. tax depreciation and amortization		(1,546	)		(1,667	)
Other deferred tax assets		75			163
Total deferred tax assets		23,900			23,769
Valuation allowance		(23,900	)		(23,769	)
Deferred tax assets, net of valuation allowance	$	—		$	—

Schedule of Changes in Deferred Tax Valuation Allowance

Changes in the deferred tax valuation allowance are as follows (in thousands):

	Years Ended September 30,
	2019		2018
Balance at the beginning of the year	$	23,769	$	22,930
Additions to valuation allowance		131		839
Balance at the end of the year	$	23,900	$	23,769

Summary of Reconciliation of Unrecognized Tax Benefits

A reconciliation of the beginning and ending amount of our unrecognized tax benefits is summarized as follows (in thousands):

	Years Ended September 30,
	2019		2018			2017
Balance at beginning of the year	$	1,198	$	4,210		$	3,860
Additions related to tax positions taken in prior    years		74		155			350
Reductions due to resolution of uncertain tax    position		—		(3,167	)		—
Balance at the end of the year	$	1,272	$	1,198		$	4,210