Income Taxes (Tables)

12 Months Ended

Mar. 31, 2019


	Year Ended March 31,
	2019		2018
United States	$	(16,678)	$	(10,041)
Foreign		27		33
Loss before provision for income taxes	$	(16,651)	$	(10,008)

A reconciliation of income tax (benefit) expense to the federal statutory rate follows (in thousands):


	Year Ended March 31,
	2019		2018
Federal income tax benefit at the statutory rate	$	(3,497)	$	(3,082)
State taxes, net of federal effect		(583)		(376)
Foreign taxes		3		10
Expiring NOLs and tax credits		6,137		12,115
Impact of state rate change		(67)		—
Valuation allowance		(2,135)		(95,547)
Enactment of Tax Cuts and Jobs Act		—		87,697
Shortfall in tax benefit—stock compensation		111		11
True-up		2		(1,217)
Other		37		407
Income tax expense	$	8	$	18

The Company’s deferred tax assets and liabilities consisted of the following at March 31, 2019 and 2018 (in thousands):


	Year Ended March 31,
	2019		2018
Deferred tax assets:
Inventories	$	1,842	$	1,893
Warranty reserve		630		402
Bad debt reserve		1,245		1,373
Deferred revenue		1,584		1,108
Net operating loss (“NOL”) carryforwards		145,835		148,405
Tax credit carryforwards		16,021		16,627
Depreciation, amortization and impairment loss		2,734		2,673
Other		1,726		1,271
Deferred tax assets		171,617		173,752
Valuation allowance for deferred tax assets		(171,617)		(173,752)
Deferred tax assets, net of valuation allowance		—		—
Deferred tax liabilities:
Federal benefit of state taxes		—		—
Net deferred tax assets	$	—	$	—

The Company’s NOL and tax credit carryforwards for federal and state income tax purposes at March 31, 2019 were as follows (in thousands):


			Expiration
	Amount		Period
Federal NOL generated before April 1, 2018	$	631,046	2020 - 2038
Federal NOL generated after March 31, 2018	$	12,200	Indefinite
State NOL	$	153,585	2028 - 2039
Federal tax credit carryforwards	$	8,365	2020 - 2038
State tax credit carryforwards	$	9,692	Indefinite

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


Balance at March 31, 2017	$	2,825
Gross increase related to prior year tax positions		—
Gross increase related to current year tax positions		—
Lapse of statute of limitations		(358)
Balance at March 31, 2018	$	2,467
Gross increase related to prior year tax positions		—
Gross increase related to current year tax positions		—
Lapse of statute of limitations		(77)
Balance at March 31, 2019	$	2,390