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Related Parties - Additional Information (Detail) - USD ($)	1 Months Ended			3 Months Ended	12 Months Ended
	Nov. 30, 2019	Apr. 30, 2019	Nov. 30, 2018	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019
Related Party Transaction [Line Items]
Sale of productive assets					$ 747,000	$ 3,000
Accounts receivable				$ 503,000	111,000	503,000
Cirius Therapeutics, Inc., [Member] \| Research Services [Member]
Related Party Transaction [Line Items]
Amount of transactions with related party for providing services					281,000
Revenue recognized from related parties agreement					281,000
Viscient Biosciences [Member]
Related Party Transaction [Line Items]
Revenue recognized from related parties agreement	$ 0	$ 0	$ 0		70,000	0
Sale of productive assets	171,000	0	0		0	0
Other income	101,000	0	0		0	0
Accounts receivable				39,000	111,000	39,000
Viscient Biosciences [Member] \| Research Services [Member]
Related Party Transaction [Line Items]
Amount of transactions with related party for providing services	0	7,000	142,000		0	0
Revenue recognized from related parties agreement	0		0	$ 42,000	107,000	0
Viscient Biosciences [Member] \| Primary Human Cell-based Products [Member] \| Samsara [Member]
Related Party Transaction [Line Items]
Revenue recognized from related parties agreement	$ 0	$ 0	$ 0		$ 128,000	$ 96,000