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INTERIM FINANCIAL REPORTING (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Total revenues	$ 12,515	$ 13,209	$ 32,789	$ 34,249
Change	$ (694)		$ (1,460)
Percent of change	(5.00%)		(4.00%)
Product Sales
Total revenues	$ 6,485	8,589	$ 20,036	23,420
Change	$ (2,104)		$ (3,384)
Percent of change	(24.00%)		(14.00%)
Product Sales | Soundwall Sales
Total revenues	$ 1,736	1,736	$ 5,824	5,790
Change	$ 0		$ 34
Percent of change	0.00%		1.00%
Product Sales | Architectural Panel Sales
Total revenues	$ 696	593	$ 2,229	1,018
Change	$ 103		$ 1,211
Percent of change	17.00%		119.00%
Product Sales | SlenderWall Sales
Total revenues	$ 26	816	$ 949	3,551
Change	$ (790)		$ (2,602)
Percent of change	(97.00%)		(73.00%)
Product Sales | Miscellaneous Wall Sales
Total revenues	$ 963	474	$ 2,994	1,243
Change	$ 489		$ 1,751
Percent of change	103.00%		141.00%
Product Sales | Barrier Sales
Total revenues	$ 1,679	1,921	$ 3,949	5,329
Change	$ (242)		$ (1,380)
Percent of change	(13.00%)		(26.00%)
Product Sales | Easi-Set and Easi-Span Building Sales
Total revenues	$ 643	2,468	$ 1,971	4,837
Change	$ (1,825)		$ (2,866)
Percent of change	(74.00%)		(59.00%)
Product Sales | Utility Sales
Total revenues	$ 254	471	$ 1,043	1,228
Change	$ (217)		$ (185)
Percent of change	(46.00%)		(15.00%)
Product Sales | Miscellaneous Sales
Total revenues	$ 488	110	$ 1,077	424
Change	$ 378		$ 653
Percent of change	344.00%		154.00%
Service Revenue
Total revenues	$ 6,030	4,620	$ 12,753	10,829
Change	$ 1,410		$ 1,924
Percent of change	31.00%		(18.00%)
Service Revenue | Barrier Rentals
Total revenues	$ 3,171	625	$ 4,820	1,787
Change	$ 2,546		$ 3,033
Percent of change	407.00%		170.00%
Service Revenue | Royalty Income
Total revenues	$ 484	427	$ 1,165	1,162
Change	$ 57		$ 3
Percent of change	13.00%		1.00%
Service Revenue | Shipping and Installation Revenue
Total revenues	$ 2,375	$ 3,568	$ 6,768	$ 7,880
Change	$ (1,193)		$ (1,112)
Percent of change	(33.00%)		(14.00%)

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