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Interim Financial Reporting (Tables)
 9 Months Ended
Sep. 30, 2018
INTERIM FINANCIAL REPORTING [Abstract]  
Disaggregation of Revenue
In the following table, revenue is disaggregated by primary sources of revenue (in thousands):
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
 
2018
2017
Change
% of Change
 
2018
2017
Change
% of Change
Product Sales:
 
 
 
 
 
 
 
 
 
Soundwall Sales
$
2,334

$
2,368

$
(34
)
(1)%
 
$
7,339

$
5,024

$
2,315

46%
Architectural Panel Sales
41

551

(510
)
(93)%
 
498

569

(71
)
(12)%
SlenderWall Sales
1,637

913

724

79%
 
4,203

912

3,291

361%
Miscellaneous Wall Sales
87

639

(552
)
(86)%
 
846

2,012

(1,166
)
(58)%
Barrier Sales
1,749

3,615

(1,866
)
(52)%
 
5,624

9,684

(4,060
)
(42)%
Easi-Set and Easi-Span Building Sales
496

730

(234
)
(32)%
 
1,557

2,127

(570
)
(27)%
Utility and Farm Product Sales
429

322

107

33%
 
890

1,129

(239
)
(21)%
Miscellaneous Product Sales
55

157

(102
)
(65)%
 
267

396

(129
)
(33)%
Total Product Sales
6,828

9,295

(2,467
)
(27)%
 
21,224

21,853

(629
)
(3)%
Barrier Rentals
540

319

221

69%
 
1,188

3,145

(1,957
)
(62)%
Royalty Income
465

483

(18
)
(4)%
 
1,193

1,387

(194
)
(14)%
Shipping and Installation Revenue
1,711

1,384

327

24%
 
4,897

5,321

(424
)
(8)%
Total Service Revenue
2,716

2,186

530

24%
 
7,278

9,853

(2,575
)
(26)%
 
 
 
 
 
 
 
 
 
 
Total Revenue
$
9,544

$
11,481

$
(1,937
)
(17)%
 
$
28,502

$
31,706

$
(3,204
)
(10)%