Income Taxes - Summary of Net Deferred Tax Accounts (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Deferred Tax Assets:
Net operating loss carryforwards	$ 6,874	$ 4,138
Amortization	2,346	2,942
Federal, foreign, and state credits	2,666	2,399
Inventory reserves	1,076	995
Deferred gain	863	866
Deferred rent	476	498
Stock compensation	498	465
Accrued vacation	276	264
Other	417	401
Gross deferred tax assets	15,492	12,968
Valuation allowance	(15,258)	(12,938)
Net deferred tax asset	234	30
Deferred Tax Liabilities:
Depreciation	(234)	(30)
Net Deferred Tax Assets	$ 0	$ 0

Deferred tax assets accrued vacation.

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Deferred Tax Assets Deferred rent.

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Deferred tax assets goodwill and intangible assets intangible assets.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from deferred income.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from inventory.

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Amount, after allocation of valuation allowances and deferred tax liability, of deferred tax asset attributable to deductible differences and carryforwards, without jurisdictional netting.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards.

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Amount, before allocation of a valuation allowances, of deferred tax assets attributable to deductible tax credit carryforwards including, but not limited to, research, foreign, general business, alternative minimum tax, and other deductible tax credit carryforwards.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from share-based compensation.

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Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

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