Note 15 - Income Taxes (Tables)

12 Months Ended

Mar. 31, 2020

Notes Tables

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

	20 20			201 9			201 8
	(in thousands)
Current:
Federal	$	3		$	4		$	112
State		(12	)		(21	)		(2	)
Total current (expense) benefit		(9	)		(17	)		110
Deferred:
Federal		—			—			—
State		—			—			—
Total deferred expense		—			—			—
Income tax (expense) benefit	$	(9	)	$	(17	)	$	110

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

	20 20			201 9			201 8
	(in thousands)
Tax provision at federal statutory income tax rate	$	(114	)	$	752		$	(282	)
Stock based compensation		(13	)		6			(11	)
Decrease (increase) in valuation allowance		159			(1,015	)		1,565
State income taxes benefit (expense), net of federal income tax effect		(2	)		264			(36	)
State rate adjustment		(32	)		(30	)		3
AMT Credit		3			4			112
Tax Cuts and Jobs Act		—			—			(1,244	)
Other, net		(10	)		2			3
Income tax (expense) benefit	$	(9	)	$	(17	)	$	110

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

	20 20			201 9			201 8
	(in thousands)
Deferred tax assets:
Net operating loss carry forwards	$	3,703		$	3,611		$	2,903
Inventory		492			509			295
Compensation accrual		136			131			153
Tax credit carry forwards		28			28			36
Interest limitation		3			174			—
Operating lease right-of-use assets		1,108			—			—
Other		25			27			22
Gross deferred tax assets		5,495			4,480			3,409
Less valuation allowance		(3,013	)		(3,172	)		(2,158	)
Net deferred tax assets		2,482			1,308			1,251
Operating lease obligations		(1,106	)		—			—
Depreciation and amortization		(1,376	)		(1,308	)		(1,251	)
Net deferred tax liabilities		(2,482	)		(1,308	)		(1,251	)
Net deferred tax assets (liabilities)	$	—		$	—		$	—

Schedule of Operating Loss and Tax Credit Carry Forwards [Table Text Block]

Expires March 31,	Net Operating Losses		Research and Experimentation Tax Credits
2022	$	2,839	$	—
2023		1,863		—
2025		—		8
2026		159		2
2027		2,665		—
2028		1,612		1
2031		389		—
2032		44		1
2033		76		16
2034		392		—
2035		18		—
2037		1,680		—
2038		168		—
2039		3,056		—
	$	14,961	$	28

Summary of Income Tax Contingencies [Table Text Block]

Open tax years ending March 31,			Jurisdiction
2017	-	2020	U.S. Federal
2017	-	2020	State of Hawaii
2016	-	2020	State of California