Annual report pursuant to Section 13 and 15(d)

Quarterly Results (Unaudited) (Details)

v3.19.1
Quarterly Results (Unaudited) (Details) - USD ($)
3 Months Ended 12 Months Ended
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Quarterly Financial Information Disclosure [Abstract]                      
Net sales $ 72,674,176 $ 77,792,878 $ 71,893,763 $ 58,480,602 $ 52,837,134 $ 54,595,924 $ 51,511,045 $ 42,203,579 $ 280,841,419 $ 201,147,682 $ 138,565,782
Gross profit 10,259,233 14,028,366 15,716,322 11,233,418 7,662,824 4,836,620 8,177,927 7,403,579 51,237,339 28,080,950 16,904,479
Net income (loss) $ 549,436 $ 5,035,558 $ 3,677,272 $ 3,835,163 1,016,693 (1,206,752) 829,879 701,542 13,097,429 1,341,362 (7,093,301)
Other comprehensive income (loss)         (10,864) (366,346) 366,346 0   (10,864)  
Comprehensive income (loss)         $ 1,005,829 $ (1,573,098) $ 1,196,225 $ 0 $ 13,097,429 $ 1,330,498 $ (7,093,301)
Per common share                      
Basic (dollars per share) $ 0.06 $ 0.57 $ 0.42 $ 0.44 $ 0.11 $ (0.14) $ 0.10 $ 0.08 $ 1.49 $ 0.15 $ (0.81)
Diluted (dollars per share) $ 0.06 $ 0.56 $ 0.41 $ 0.44 $ 0.11 $ (0.14) $ 0.10 $ 0.08 $ 1.48 $ 0.15 $ (0.81)