Income Taxes - Summary of Significant Components of Deferred Tax Assets (Detail) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Deferred tax assets:
Acquired technology	$ 1,089,000	$ 80,000
Stock compensation expense	695,000	846,000
Lease liability	59,000	39,000
Accruals and other	214,000	237,000
Total deferred tax assets	2,057,000	1,202,000
Deferred tax liabilities:
Right of use asset	(59,000)	(39,000)
Total deferred tax liabilities	(59,000)	(39,000)
Less valuation allowance	$ (1,998,000)	$ (1,163,000)