INTERIM FINANCIAL REPORTING (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Total revenues	$ 13,100,000	$ 12,515,000	$ 40,625,000	$ 32,789,000
Change	$ 585,000	$ 585,000	$ 7,836,000	$ 7,836,000
Percent of change	5.00%	5.00%	24.00%	24.00%
Product Sales
Total revenues	$ 7,205,000	$ 6,485,000	$ 21,868,000	$ 20,036,000
Change	$ 720,000	$ 720,000	$ 1,832,000	$ 1,832,000
Percent of change	11.00%	11.00%	9.00%	9.00%
Product Sales | Soundwall Sales
Total revenues	$ 2,407,000	$ 1,736,000	$ 6,496,000	$ 5,824,000
Change	$ 671,000	$ 671,000	$ 672,000	$ 672,000
Percent of change	39.00%	39.00%	12.00%	12.00%
Product Sales | Architectural Panel Sales
Total revenues	$ 406,000	$ 696,000	$ 3,843,000	$ 2,229,000
Change	$ (290,000)	$ (290,000)	$ 1,614,000	$ 1,614,000
Percent of change	(42.00%)	(42.00%)	72.00%	72.00%
Product Sales | SlenderWall Sales
Total revenues	$ 1,027,000	$ 26,000	$ 1,247,000	$ 949,000
Change	$ 1,001,000	$ 1,001,000	$ 298,000	$ 298,000
Percent of change	3850.00%	3850.00%	31.00%	31.00%
Product Sales | Miscellaneous Wall Sales
Total revenues	$ 520,000	$ 963,000	$ 1,804,000	$ 2,994,000
Change	$ (443,000)	$ (443,000)	$ (1,190,000)	$ (1,190,000)
Percent of change	(46.00%)	(46.00%)	(40.00%)	(40.00%)
Product Sales | Barrier Sales
Total revenues	$ 1,022,000	$ 1,679,000	$ 3,578,000	$ 3,949,000
Change	$ (657,000)	$ (657,000)	$ (371,000)	$ (371,000)
Percent of change	(39.00%)	(39.00%)	(9.00%)	(9.00%)
Product Sales | Easi-Set and Easi-Span Building Sales
Total revenues	$ 676,000	$ 643,000	$ 2,278,000	$ 1,971,000
Change	$ 33,000	$ 33,000	$ 307,000	$ 307,000
Percent of change	5.00%	5.00%	16.00%	16.00%
Product Sales | Utility Sales
Total revenues	$ 891,000	$ 254,000	$ 1,628,000	$ 1,043,000
Change	$ 637,000	$ 637,000	$ 585,000	$ 585,000
Percent of change	251.00%	251.00%	56.00%	56.00%
Product Sales | Miscellaneous Sales
Total revenues	$ 256,000	$ 488,000	$ 994,000	$ 1,077,000
Change	$ (232,000)	$ (232,000)	$ (83,000)	$ (83,000)
Percent of change	(48.00%)	(48.00%)	(8.00%)	(8.00%)
Service Revenue
Total revenues	$ 5,895,000	$ 6,030,000	$ 18,757,000	$ 12,753,000
Change	$ (135,000)	$ (135,000)	$ 6,004,000	$ 6,004,000
Percent of change	(2.00%)	(2.00%)	47.00%	47.00%
Service Revenue | Barrier Rentals
Total revenues	$ 1,708,000	$ 3,171,000	$ 8,667,000	$ 4,820,000
Change	$ (1,463,000)	$ (1,463,000)	$ 3,847,000	$ 3,847,000
Percent of change	(46.00%)	(46.00%)	80.00%	80.00%
Service Revenue | Royalty Income
Total revenues	$ 676,000	$ 484,000	$ 1,788,000	$ 1,165,000
Change	$ 192,000	$ 192,000	$ 623,000	$ 623,000
Percent of change	40.00%	40.00%	53.00%	53.00%
Service Revenue | Shipping and Installation Revenue
Total revenues	$ 3,511,000	$ 2,375,000	$ 8,302,000	$ 6,768,000
Change	$ 1,136,000	$ 1,136,000	$ 1,534,000	$ 1,534,000
Percent of change	48.00%	48.00%	23.00%	23.00%