Collaborative Research, Development, and License Agreements - Additional Information (Detail)	1 Months Ended						12 Months Ended
	Jan. 03, 2020 USD ($)	Nov. 30, 2019 USD ($)	Jan. 31, 2019 USD ($)	May 31, 2011	Mar. 31, 2010	Mar. 31, 2009	Mar. 31, 2021 USD ($) Milestone	Mar. 31, 2020 USD ($)	Mar. 31, 2016 USD ($)	Mar. 31, 2015 USD ($)	Mar. 31, 2014 USD ($)
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Total Revenues							$ 0	$ 2,196,000
Licensing Agreements [Member]
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Amortization expense of licenses							$ 14,000	14,000
Weighted average remaining amortization period for all licenses							9 years
Annual amortization expense of licenses year 1							$ 14,000
Annual amortization expense of licenses year 2							14,000
Annual amortization expense of licenses year 3							14,000
Annual amortization expense of licenses year 4							14,000
Annual amortization expense of licenses year 5							14,000
University of Missouri [Member]
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Royalty fees percentage minimum					1.00%	1.00%
Royalty fees percentage maximum					3.00%	3.00%
Minimum annual royalty paid	$ 25,000		$ 25,000
Excess of minimum annual royalties payment							0	0
Expected expiration year of license agreement						2029
Upfront payment							$ 0	0
License agreement termination date							Feb. 18, 2021
Clemson University [Member]
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Minimum annual royalty paid							$ 40,000	40,000
Minimum annual royalty payment due									$ 40,000	$ 20,000	$ 20,000
Clemson University [Member] | Licensing Agreements [Member]
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Royalty fees percentage minimum				1.50%
Royalty fees percentage maximum				3.00%
Expected expiration year of license agreement				2024-05
UniQuest [Member]
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
License agreement termination date							Apr. 22, 2021
milestone payments							$ 20,000
Number of milestone payments | Milestone							2
UniQuest [Member] | Licensing Agreements [Member]
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
milestone payments							$ 0
Collaborations and Licenses [Member]
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Total Revenues							0	89,000
Collaborations and Licenses [Member] | December 2016 Non-exclusive Research Affiliation Collaborative [Member]
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Total Revenues							$ 0	$ 19,000
Collaborations and Licenses [Member] | November 2019 Agreement [Member] | Viscient Biosciences [Member]
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Total Revenues		$ 70,000