Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2019

Accounting Policies [Abstract]

Property and equipment estimated useful lives

	Years
Buildings		10-40
Trucks and automotive equipment		3-10
Shop machinery and equipment		3-10
Land improvements		10-15
Rental equipment		5-10
Office equipment		3-10

Disaggregation of revenue

Revenue by Type (Disaggregated Revenue)	2019		2018		Change			% Change
Product Sales:
Soundwall Sales	$	7,736	$	9,867	$	(2,131	)		(21.6	)%
Architectural Sales		1,104		876		228			26.0	%
SlenderWall Sales		5,063		5,572		(509	)		(9.1	)%
Miscellaneous Wall Sales		1,685		1,760		(75	)		(4.3	)%
Barrier Sales		8,582		7,264		1,318			18.1	%
Easi-Set and Easi-Span Building Sales		5,937		2,114		3,823			180.8	%
Utility Sales		1,608		1,232		376			30.5	%
Miscellaneous Sales		513		474		39			8.2	%
Total Product Sales		32,228		29,159		3,069			10.5	%
Barrier Rentals		2,488		1,729		759			43.9	%
Royalty Income		1,672		1,675		(3	)		(0.2	)%
Shipping and Installation Revenue		10,303		7,657		2,646			34.6	%
Total Service Revenue		14,463		11,061		3,402			30.8	%
Total Revenue	$	46,691	$	40,220	$	6,471			16.1	%