Income Taxes (Tables)

12 Months Ended

Mar. 31, 2023

Income Tax Disclosure [Abstract]

Schedule of Significant Components of Deferred Tax Assets and Liabilities

Significant components of the Company’s deferred tax assets and deferred tax liabilities as of the dates presented as follows (in thousands):

	March 31,
	2023		2022
Deferred tax assets:
Net operating loss carryforwards	$	53,496	$	49,715
Tax credits	6,898		6,171
California capitalized research and development	1		40
Research and development	1,708		—
Others, net	679		564
Total deferred tax assets	62,782		56,490
Valuation allowance	(62,933)		(56,550)
Deferred tax asset, net of valuation allowance	(151)		(60)
Deferred tax liabilities:
Fixed assets	151		60
Total deferred tax liabilities	151		60
Net deferred tax assets	$	—	$	—

Schedule of Reconciliation Between the Federal Statutory Rate and the Effective Tax Rate

Reconciliation between federal statutory tax rate and the effective tax rate is shown in the following table for the periods presented:

	Year Ended March 31,
	2023		2022
Federal statutory income tax rate	21.00	%	21.00	%
Research and development credit	2.38	%	7.10	%
Nondeductible expense	(0.70)	%	1.80	%
Loss in joint venture	—	%	(1.87)	%
Foreign income tax rate difference	0.99	%	1.39	%
Others, net	(0.90)	%	(0.40)	%
Valuation allowance	(22.77)	%	(29.02)	%
Effective tax rate	—	%	—	%