Leases - Additional Information (Detail) $ in Thousands		1 Months Ended			12 Months Ended
	Apr. 30, 2021 USD ($) ft²	Nov. 30, 2021 ft² Employee	Jun. 30, 2021 USD ($) Employee	Jan. 31, 2019 ft²	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Aug. 31, 2019 USD ($)
Leases [Line Items]
ROU asset					$ 2,289	$ 2,272	$ 2,100
Rent abatement duration						14 months
Lease description			In June 2021, the Company signed a one-year lease renewal for its engineering design center in Beijing, China.	In January 2019, the Company entered into an eleven-year lease ending February 28, 2031 for 21,030 square feet of office space in Clarksburg, Maryland for the Company’s test & measurement product line. The Company moved the operations for its test & measurement product line from its Germantown, Maryland office in January 2020.	On October 16, 2020, the Wang Zhuang Village Committee issued a notice informing PCTEL Tianjin that the Chinese Party Central Committee and the State Council were accelerating the layout optimization and transformation of the industrial park in which the leased premises is located, and accordingly leases and lease extensions for all premises in the industrial park were suspended. As a result of the uncertainty regarding the Tianjin Lease renewal, the Company accelerated its plan to transition all manufacturing in Tianjin to contract manufacturers. The Company completed the manufacturing transition in the first quarter 2022. With the transition complete, the Company plans to vacate the Tianjin manufacturing facility during the first half of 2022. The Company plans to retain a team of 10-15 employees associated with sourcing, quality, and local customer support at a new leased facility in Tianjin, China. In November 2021, the Company entered into a two-year lease ending December 31, 2023 for 1,694 square feet of office space in Tianjin, China. The Company recognized a present value of the right of use asset of $0.1 million on December 31, 2021.
Operating lease liability					$ 4,075
Total lease obligation			$ 100
Tianjin [Member]
Leases [Line Items]
Operating lease term of contract		2 years
Area of lease | ft²		1,694
ROU asset					$ 100
Lease expiration date		Dec. 31, 2023
Smarteq Wireless Aktiebolag [Member]
Leases [Line Items]
ROU asset	$ 200
Operating lease liability	$ 200
Test & Measurement Product Line [Member]
Leases [Line Items]
Operating lease term of contract				11 years
Area of lease | ft²				21,030
Tenant improvement incentives in form of cash reimbursements						$ 1,500
Lease expiration date						Feb. 28, 2031
Engineering Sales And Administration | Smarteq Wireless Aktiebolag [Member]
Leases [Line Items]
Area of lease | ft²	4,080
Lease expiration date	Jul. 31, 2023
Beijing Design Center [Member]
Leases [Line Items]
Operating lease term of contract			1 year
Number of separate employees | Employee		14
Number of former employees rehired | Employee			4