INTERIM FINANCIAL REPORTING (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Total revenues	$ 13,209	$ 9,544	$ 34,249	$ 28,502
Change	$ 3,665		$ 5,747
Percent of change	38.00%		20.00%
Product sales
Total revenues	$ 8,589	6,828	$ 23,420	21,224
Change	$ 1,761		$ 2,196
Percent of change	26.00%		10.00%
Product sales | Soundwall sales
Total revenues	$ 1,736	2,334	$ 5,790	7,339
Change	$ (598)		$ (1,549)
Percent of change	(26.00%)		(21.00%)
Product sales | Architectural panel sales
Total revenues	$ 593	41	$ 1,018	498
Change	$ 552		$ 520
Percent of change	1346.00%		104.00%
Product sales | SlenderWall sales
Total revenues	$ 816	1,637	$ 3,551	4,203
Change	$ (821)		$ (652)
Percent of change	(50.00%)		(16.00%)
Product sales | Miscellaneous wall sales
Total revenues	$ 474	87	$ 1,243	846
Change	$ 387		$ 397
Percent of change	445.00%		47.00%
Product sales | Barrier sales
Total revenues	$ 1,921	1,749	$ 5,329	5,624
Change	$ 172		$ (295)
Percent of change	10.00%		(5.00%)
Product sales | Easi-Set and Easi-Span building sales
Total revenues	$ 2,468	496	$ 4,837	1,557
Change	$ 1,972		$ 3,208
Percent of change	398.00%		211.00%
Product sales | Utility and farm product sales
Total revenues	$ 471	429	$ 1,228	890
Change	$ 42		$ 338
Percent of change	10.00%		38.00%
Product sales | Miscellaneous sales
Total revenues	$ 110	55	$ 424	267
Change	$ 55		$ 157
Percent of change	100.00%		59.00%
Service revenue
Total revenues	$ 4,620	2,716	$ 10,829	7,278
Change	$ 1,904		$ 3,551
Percent of change	70.00%		49.00%
Service revenue | Barrier rentals
Total revenues	$ 625	540	$ 1,787	1,188
Change	$ 85		$ 599
Percent of change	16.00%		50.00%
Service revenue | Royalty income
Total revenues	$ 427	465	$ 1,162	1,193
Change	$ (38)		$ (31)
Percent of change	(8.00%)		(3.00%)
Service revenue | Shipping and installation revenue
Total revenues	$ 3,568	$ 1,711	$ 7,880	$ 4,897
Change	$ 1,857		$ 2,983
Percent of change	109.00%		61.00%