Intangible Assets - Schedule of Intangible Assets (Detail) - USD ($) $ in Thousands	Mar. 31, 2022	Mar. 31, 2021
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 1,434	$ 4,390
Accumulated Amortization	(914)	(3,771)
Net Carrying Amount	520	619
Customer Relationships [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount		2,711
Accumulated Amortization		(2,711)
Brands Associated with Acquired Cell Lines [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	533	559
Accumulated Amortization	(194)	(190)
Net Carrying Amount	339	369
Product Licenses [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	901	944
Accumulated Amortization	(720)	(694)
Net Carrying Amount	$ 180	250
Other Intangibles [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount		176
Accumulated Amortization		$ (176)