Organization and Summary of Significant Accounting Policies - Additional Information (Detail)						12 Months Ended
	Jun. 24, 2022 USD ($) shares	Apr. 04, 2022 USD ($)	Mar. 12, 2021 USD ($) Investment	May 15, 2019 USD ($)	Jun. 29, 2018 USD ($)	Mar. 31, 2022 USD ($) Customer	Mar. 31, 2021 USD ($) Customer	Apr. 15, 2021	Jan. 31, 2015 USD ($)
Significant Accounting Policies [Line Items]
Accumulated deficit						$ (725,042,000)	$ (599,912,000)
Cash holdings and investments						83,200,000
Restricted cash						8,744,000	9,024,000
Allowance for doubtful accounts						$ 65,000	$ 48,000
Number of customer represent 10% or more of accounts receivable | Customer						1	1
Number of customer represent 10% or more of product sales | Customer						1	1
Stock-based compensation cost included in inventory						$ 0	$ 0
Property and equipment impairment losses						0	0
Impairment losses						$ 0	$ 0
Class of warrants description						As of March 31, 2022, the Company had one class of warrants to purchase ordinary shares outstanding which comprised warrants that were issued in December 2013 and August 2015 in connection with the establishment and subsequent increase of the Company’s then existing secured term loan facility
Change in accounting principle, adoption date						Apr. 01, 2021
Accounting Standards Update 2016-13 [Member]
Significant Accounting Policies [Line Items]
Change in accounting principle, adopted							true
Change in accounting principle, immaterial effect							true
Accounting Standards Update 2018-14 [Member]
Significant Accounting Policies [Line Items]
Change in accounting principle, adopted							true
Change in accounting principle, immaterial effect							true
Customer Relationships [Member]
Significant Accounting Policies [Line Items]
Intangible assets amortization over estimated useful life						5 years
Brands Associated with Acquired Cell Lines [Member]
Significant Accounting Policies [Line Items]
Intangible assets amortization over estimated useful life						40 years
Product Licenses [Member]
Significant Accounting Policies [Line Items]
Intangible assets amortization over estimated useful life						10 years
Other Intangibles [Member]
Significant Accounting Policies [Line Items]
Intangible assets amortization over estimated useful life						7 years
Distribution and Supply Agreement [Member]
Significant Accounting Policies [Line Items]
Milestone amount receivable upon fulfillment of achievement									$ 59,000,000.0
Minimum [Member]
Significant Accounting Policies [Line Items]
Plant, machinery and equipment useful life						10 years
Maximum [Member]
Significant Accounting Policies [Line Items]
Plant, machinery and equipment useful life						15 years
Plant, Machinery and Equipment [Member] | Minimum [Member]
Significant Accounting Policies [Line Items]
Plant, machinery and equipment useful life						4 years
Plant, Machinery and Equipment [Member] | Maximum [Member]
Significant Accounting Policies [Line Items]
Plant, machinery and equipment useful life						25 years
Credit Concentration Risk [Member] | Accounts Receivable [Member] | Customer [Member]
Significant Accounting Policies [Line Items]
Concentration risk percentage						71.00%	74.00%
Security For Property Rental Obligations of Subsidiary [Member]
Significant Accounting Policies [Line Items]
Restricted cash						$ 700,000	$ 300,000
Senior Secured Notes Due 2023 [Member] | Cash Reserve Account Held by Collateral Agent [Member]
Significant Accounting Policies [Line Items]
Restricted cash						$ 8,000,000.0	$ 8,700,000
Subsequent Event [Member]
Significant Accounting Policies [Line Items]
Number of ordinary sahres | shares	66,666,667
Additional number of ordinary shares purchased | shares	10,000,000
Aggregate gross proceeds from underwritten public offering	$ 20,000,000.0
Net proceeds from issuance of shares	$ 18,500,000
Secured Notes [Member]
Significant Accounting Policies [Line Items]
Aggregate principal amount of notes				$ 25	$ 36,000,000
Debt instrument, interest rate						12.00%	12.00%	12.00%
CSAM [Member]
Significant Accounting Policies [Line Items]
Number of short-term funds invested | Investment			2
Impairment recognized, related to one of the short term funds invested							$ 2,300,000
Payments for (proceeds from) short-term investments			$ 89,000,000.0
Aggregate investment in suspend redemptions			$ 110,350,000
CSAM [Member] | Subsequent Event [Member]
Significant Accounting Policies [Line Items]
Impairment recognized, related to one of the short term funds invested		$ 1,000,000.0
Product [Member] | Customer Concentration Risk [Member] | Sales [Member]
Significant Accounting Policies [Line Items]
Concentration risk percentage						62.00%	60.00%
Ortho's [Member]
Significant Accounting Policies [Line Items]
Non-refundable milestone payment						$ 7,500,000
Ortho's [Member] | Letter Agreement [Member]
Significant Accounting Policies [Line Items]
Non-refundable milestone payment						$ 7,500,000
Commencing on receipt of specified regulatory approvals period						10 years
Ortho's [Member] | Maximum [Member]
Significant Accounting Policies [Line Items]
Additional milestone payments receivable upon achievement of regulatory milestones and commercial sales benchmarks						$ 60,000,000
Milestone payments receivable upon achievement of cumulative gross revenue hurdles						25,000,000
MosaiQ [Member]
Significant Accounting Policies [Line Items]
Revenue recognized for milestone represents payment in respect of development work							$ 7,500,000
Revenue remaining performance obligation						$ 0
MosaiQ [Member] | Secured Notes [Member]
Significant Accounting Policies [Line Items]
Debt instrument subscribers rights to receive payment as percentage of net MosaiQ sales						3.40%