Annual report pursuant to Section 13 and 15(d)

Supplementary Data - Quarterly Financial Data (Details)

v3.20.4
Supplementary Data - Quarterly Financial Data (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Supplementary Data - Quarterly Financial Data [Abstract]                      
Sales $ 75,947 $ 64,491 $ 30,014 $ 53,555 $ 61,022 $ 60,203 $ 46,994 $ 61,218 $ 224,007 $ 229,437 $ 212,141
Gross profit 26,978 21,669 10,636 18,512 21,686 20,557 15,992 22,056 77,795 80,291 73,962
Operating income (loss) 5,524 1,555 (4,037) 892 4,179 4,077 (1,241) 4,417 3,934 11,432 8,171
Net income (loss) $ 7,069 $ 1,183 $ (2,743) $ 36 $ 12,387 $ 3,492 $ (694) $ 3,787 $ 5,545 $ 18,972 $ 7,301
Earnings (loss) per share:                      
Basic net income (loss) per share $ 0.23 $ 0.04 $ (0.09) $ 0.00 $ 0.42 $ 0.12 $ (0.02) $ 0.13 $ 0.18 $ 0.64 $ 0.24
Diluted net income (loss) per share $ 0.22 $ 0.04 $ (0.09) $ 0.00 $ 0.40 $ 0.11 $ (0.02) $ 0.12 $ 0.18 $ 0.61 $ 0.24