Transactions between the Company and Related Parties - Related Party Transactions (Detail) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Related Party Transaction [Line Items]
Total Sales		$ 142		$ 289
Bridgeview Facility [Member]
Related Party Transaction [Line Items]
Rent paid:	[1]	69	$ 69	205	$ 201
Terex Corporation [Member]
Related Party Transaction [Line Items]
Total Sales		3		11
Purchases from:		142	$ 139	1,050	$ 809
Tadano, Ltd [Member]
Related Party Transaction [Line Items]
Total Sales		$ 139		$ 278

[1] The Company leases its 40,000 sq. ft. Bridgeview facility from an entity controlled by Mr. David Langevin, the Company’s Executive Chairman and former CEO. Pursuant to the terms of the lease, the Company makes monthly lease payments of $23. The Company is also responsible for all the associated operations expenses, including insurance, property taxes, and repairs. On October 3, 2018, the lease was amended to extend the initial lease term to fifteen years expiring in May 26, 2025 with a provision for an option one five-year period and thereafter, six one year extension periods. The lease contains a rental escalation clause under which annual rent is increased during the initial lease term by the lesser of the increase in the Consumer Price Increase or 2.0%. Rent for any extension period shall, however, be the then-market rate for similar industrial buildings within the market area. The Company has the option to purchase the building by giving the Landlord written notice at any time prior to the date that is 180 days prior to the expiration of the lease or any extension period. The Landlord can require the Company to purchase the building if a Change of Control Event, as defined in the agreement occurs by giving written notice to the Company at any time prior to the date that is 180 days prior to expiration of the lease or any extension period. The purchase price regardless whether the purchase is initiated by the Company or the landlord will be the Fair Market Value as of the closing date of said sale.