Annual report pursuant to Section 13 and 15(d)

Supplementary Data - Quarterly Financial Data (Details)

v3.20.1
Supplementary Data - Quarterly Financial Data (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Supplementary Data - Quarterly Financial Data [Abstract]                      
Sales $ 61,022 $ 60,203 $ 46,994 $ 61,218 $ 57,307 $ 55,686 $ 45,881 $ 53,267 $ 229,437 $ 212,141 $ 170,687
Gross profit 21,686 20,557 15,992 22,056 20,418 19,857 15,860 17,827 80,291 73,962 53,810
Operating income (loss) 4,179 4,077 (1,241) 4,417 3,788 4,012 (123) 494 11,432 8,171 (4,815)
Net income (loss) $ 12,387 $ 3,492 $ (694) $ 3,787 $ 3,548 $ 4,127 $ (777) $ 403 $ 18,972 $ 7,301 $ (673)
Earnings (loss) per share:                      
Basic net income (loss) per share $ 0.42 $ 0.12 $ (0.02) $ 0.13 $ 0.12 $ 0.14 $ (0.03) $ 0.01 $ 0.64 $ 0.24 $ (0.02)
Diluted net income (loss) per share $ 0.40 $ 0.11 $ (0.02) $ 0.12 $ 0.12 $ 0.14 $ (0.03) $ 0.01 $ 0.61 $ 0.24 $ (0.02)