Stock-Based Compensation - Summary of the Reserved Shares of Common Stock for Future Issuance (Detail) - shares	Dec. 31, 2021	Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total shares reserved	3,648,275	4,051,457
PCTEL, Inc. 2019 Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total shares reserved	1,870,260	2,109,184
PCTEL, Inc. 2015 Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total shares reserved	299,979	299,979
PCTEL, Inc. 2019 Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total shares reserved	1,478,036	1,642,294