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Interim Financial Reporting Interim Financial Reporting - Disaggregation of Revenue (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017
Disaggregation of Revenue [Line Items] |  |  |  |
Total Revenue | $ 9,544 | $ 11,481 | $ 28,502 | $ 31,706
Change | $ (1,937) |  | $ (3,204) |
% of Change | (17.00%) |  | (10.00%) |
Soundwall Sales |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Revenue | $ 2,334 | 2,368 | $ 7,339 | 5,024
Change | $ (34) |  | $ 2,315 |
% of Change | (1.00%) |  | 46.00% |
Architectural Panel Sales |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Revenue | $ 41 | 551 | $ 498 | 569
Change | $ (510) |  | $ (71) |
% of Change | (93.00%) |  | (12.00%) |
SlenderWall Sales |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Revenue | $ 1,637 | 913 | $ 4,203 | 912
Change | $ 724 |  | $ 3,291 |
% of Change | 79.00% |  | 361.00% |
Miscellaneous Wall Sales |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Revenue | $ 87 | 639 | $ 846 | 2,012
Change | $ (552) |  | $ (1,166) |
% of Change | (86.00%) |  | (58.00%) |
Barrier Sales |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Revenue | $ 1,749 | 3,615 | $ 5,624 | 9,684
Change | $ (1,866) |  | $ (4,060) |
% of Change | (52.00%) |  | (42.00%) |
Easi-Set and Easi-Span Building Sales |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Revenue | $ 496 | 730 | $ 1,557 | 2,127
Change | $ (234) |  | $ (570) |
% of Change | (32.00%) |  | (27.00%) |
Utility and Farm Product Sales |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Revenue | $ 429 | 322 | $ 890 | 1,129
Change | $ 107 |  | $ (239) |
% of Change | 33.00% |  | (21.00%) |
Miscellaneous Product Sales |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Revenue | $ 55 | 157 | $ 267 | 396
Change | $ (102) |  | $ (129) |
% of Change | (65.00%) |  | (33.00%) |
Total Product Sales |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Revenue | $ 6,828 | 9,295 | $ 21,224 | 21,853
Change | $ (2,467) |  | $ (629) |
% of Change | (27.00%) |  | (3.00%) |
Barrier Rentals |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Revenue | $ 540 | 319 | $ 1,188 | 3,145
Change | $ 221 |  | $ (1,957) |
% of Change | 69.00% |  | (62.00%) |
Royalty Income |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Revenue | $ 465 | 483 | $ 1,193 | 1,387
Change | $ (18) |  | $ (194) |
% of Change | (4.00%) |  | (14.00%) |
Shipping and Installation Revenue |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Revenue | $ 1,711 | 1,384 | $ 4,897 | 5,321
Change | $ 327 |  | $ (424) |
% of Change | 24.00% |  | (8.00%) |
Total Service Revenue |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Revenue | $ 2,716 | $ 2,186 | $ 7,278 | $ 9,853
Change | $ 530 |  | $ (2,575) |
% of Change | 24.00% |  | (26.00%) |

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