Intangible Assets - Schedule of Intangible Assets (Detail) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Dec. 31, 2016	Mar. 31, 2016
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 3,792	$ 4,344
Accumulated Amortization	(3,016)	(3,442)
Net Carrying Amount	$ 776	$ 902
Weighted-Average Remaining Useful Life	18 years	18 years 10 months 24 days
Customer Relationships [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 2,429	$ 2,829
Accumulated Amortization	(2,429)	(2,829)
Brands Associated with Acquired Cell Lines [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	501	583
Accumulated Amortization	(117)	(125)
Net Carrying Amount	$ 384	$ 458
Weighted-Average Remaining Useful Life	30 years 8 months 12 days	31 years 4 months 24 days
Product Licenses [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 704	$ 748
Accumulated Amortization	(312)	(304)
Net Carrying Amount	$ 392	$ 444
Weighted-Average Remaining Useful Life	5 years 7 months 6 days	5 years 10 months 24 days
Other Intangibles Assets [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 158	$ 184
Accumulated Amortization	$ (158)	$ (184)