Leases - Additional Information (Detail) $ in Thousands	1 Months Ended	3 Months Ended
	Jan. 31, 2019 ft²	Mar. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Aug. 31, 2019 USD ($)
Leases [Line Items]
Right of Use Asset		$ 2,496	$ 2,696	$ 2,100
Tenant improvement incentives in form of cash reimbursements		$ 28
Rent abatement duration		14 months
Lease description	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 to the new office in January 2020.
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