Related Party Transactions - Additional Information (Detail)	1 Months Ended			12 Months Ended
	Apr. 30, 2020 USD ($) a Lease	Mar. 31, 2020 USD ($) a	Feb. 28, 2019 USD ($) a	Dec. 31, 2020 USD ($) Lease shares	Dec. 31, 2019 USD ($)
Related Party Transaction [Line Items]
Royalty fees due				$ 80,000	$ 40,000
Number of lease amendments | Lease	2			4
Lease payments				$ 84,000	84,000
Stock-based compensation				2,042,000	2,287,000
Mr. Kevin Comcowich [Member]
Related Party Transaction [Line Items]
Acres of land | a			10
Operating leases, term of contract			2 years
Rent payments			$ 1,200
Out of pocket costs					126,400
Payments received from contractor					44,000
Stock-based compensation				$ 9,000
Lease expiration date				Feb. 28, 2022
Number of parcels of leased land | Lease				5
Options issued to purchase common stock | shares				5,273
Mr. Kevin Comcowich [Member] | Amendment [Member]
Related Party Transaction [Line Items]
Acres of land | a	15	10
Operating leases, term of contract	2 years	2 years
Number of additional properties under lease agreement	two additional 15-acre parcels	two additional 10-acre parcels
Rent payments	$ 1,200	$ 1,200
John Sperling Foundation [Member]
Related Party Transaction [Line Items]
Royalty fees due				$ 80,000	$ 40,000