Intangible Assets - Schedule of Intangible Assets (Detail) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Dec. 31, 2015	Mar. 31, 2015
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 4,475	$ 4,419
Accumulated Amortization	(3,523)	(3,469)
Net Carrying Amount	952	950
Customer Relationships [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	2,915	2,923
Accumulated Amortization	(2,915)	(2,923)
Brands Associated with Acquired Cell Lines [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	601	603
Accumulated Amortization	(125)	(115)
Net Carrying Amount	$ 476	$ 488
Weighted-Average Remaining Useful Life	31 years 8 months 12 days	32 years 4 months 24 days
Product Licenses [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 770	$ 703
Accumulated Amortization	(294)	(241)
Net Carrying Amount	$ 476	$ 462
Weighted-Average Remaining Useful Life	6 years 1 month 6 days	6 years 7 months 6 days
Other Intangibles Assets [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 189	$ 190
Accumulated Amortization	$ (189)	$ (190)