Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Income Tax Disclosure [Line Items]
Income tax expense (benefit)	$ 8	$ 6
Statutory rate	21.00%	21.00%
Net deferred tax assets	$ 15,200		$ 15,300
Operating loss and credit carry forward, expiration period	On a regular basis, the Company evaluates the recoverability of deferred tax assets and the need for a valuation allowance. Such evaluations involve the application of significant judgment. The Company considers multiple factors in its evaluation of the need for a valuation allowance. The Company’s federal NOLs generated in 2018 and future periods will not expire, and the Company’s NOLs and credits generated as of December 31, 2017 have a finite life primarily based on the 20-year carry forward of federal net operating losses. The timing differences have a ratable reversal pattern over 12 years.
Net operating loss carry forward period	20 years
Domestic deferred tax assets ratable reversal pattern period	12 years
Gross unrecognized tax benefit	$ 800		800
Liability related to income tax uncertainties	800		$ 800
Deferred payroll taxes	200
Smarteq Wireless Aktiebolag [Member]
Income Tax Disclosure [Line Items]
Net deferred tax assets	2,300
Domestic Tax Authority [Member]
Income Tax Disclosure [Line Items]
Net deferred tax assets	11,900
Foreign Tax Authority | CHINA [Member]
Income Tax Disclosure [Line Items]
Net deferred tax assets	1,200
Foreign Tax Authority | Sweden [Member]
Income Tax Disclosure [Line Items]
Net deferred tax assets	$ 2,100