Licensing Agreements and Research Contracts - Additional Information (Detail) - USD ($)	1 Months Ended					12 Months Ended
	Jan. 31, 2019	Jan. 31, 2018	May 31, 2011	Mar. 31, 2010	Mar. 31, 2009	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2014
Licensing Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization expense of licenses						$ 14,000	$ 13,600
Weighted average remaining amortization period for all licenses						11 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]
Finite-Lived Intangible Assets [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
Clemson University [Member]
Finite-Lived Intangible Assets [Line Items]
Minimum annual royalty payment due								$ 40,000	$ 20,000	$ 20,000
Clemson University [Member] | Licensing Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Royalty fees percentage minimum			1.50%
Royalty fees percentage maximum			3.00%
Expected expiration year of license agreement			2024-05