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Basis of Presentation (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2016
Mar. 31, 2016
Sep. 30, 2015
Mar. 31, 2015
Jun. 30, 2016
Jun. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Dec. 31, 2015
Net sales $ 29,990   $ 29,599       $ 93,691 $ 89,042  
Cost of goods sold 21,478   20,049       65,480 63,916  
Total cost of goods sold 22,011   20,663       67,277 65,725  
Gross profit 7,979   8,936       26,414 23,317  
Selling expenses 4,306   2,706       10,733 8,626  
General and administrative 3,308   3,998       10,300 10,643  
Amortization expense 176   179       529 537  
Total operating expenses 7,790   6,883       21,562 19,806  
Income from operations $ 189   $ 2,053       $ 4,852 3,511  
As Previously Reported [Member]                  
Net sales   $ 32,570   $ 29,622 $ 63,701 $ 59,443   89,042 $ 118,587
Cost of goods sold   23,351   21,239 44,290 44,044   64,588 86,986
Total cost of goods sold   9,219   8,383 19,411 15,399   24,454 31,601
Gross profit   2,964   3,302 6,427 5,920   9,486 12,752
Selling expenses   4,465   3,492 7,968 7,662   10,920 13,730
General and administrative   176   179 353 358   537 716
Amortization expense   7,605   6,973 14,748 13,940   20,943 27,198
Total operating expenses   1,614   1,410 4,663 1,459   3,511 4,403
Adjustment [Member]                  
Net sales      
Cost of goods sold   519   458 976 1,017   1,137 1,556
Total cost of goods sold   (519)   (458) (976) (1,017)   (1,137) (1,556)
Gross profit       (860) (860)
Selling expenses   (519)   (458) (976) (1,017)   (277) (696)
General and administrative      
Amortization expense   (519)   (458) (976) (1,017)   (1,137) (1,556)
Total operating expenses      
As Revised [Member]                  
Net sales   32,570   29,622 63,701 59,443   89,042 118,587
Cost of goods sold   23,870   21,697 45,266 45,061   65,725 88,542
Total cost of goods sold   8,700   7,925 18,435 14,382   23,317 30,045
Gross profit   2,964   3,302 6,427 5,920   8,626 11,892
Selling expenses   3,946   3,034 6,992 6,645   10,643 13,034
General and administrative   176   179 353 358   537 716
Amortization expense   7,086   6,515 13,772 12,923   19,806 25,642
Total operating expenses   $ 1,614   $ 1,410 $ 4,663 $ 1,459   $ 3,511 $ 4,403