Stock Award Plans and Stock-based Compensation - Schedule of Stock-based Compensation Expense (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total share based compensation expense	$ 181,702	$ 146,951	$ 411,192	$ 740,304
Cost of Goods Sold [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total share based compensation expense	10,994	4,449	21,246	13,058
Research and Development [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total share based compensation expense	26,749	24,651	52,424	81,492
Selling, General and Administrative [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total share based compensation expense	$ 143,959	$ 117,851	$ 337,522	$ 645,754