CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Income Statement [Abstract]
Net sales	$ 55,658	$ 73,564
Cost of products sold	42,745	49,094
Gross profit	12,913	24,470
Costs and expenses:
General and administrative expenses	7,929	8,126
Selling and distribution expenses	5,243	8,527
Amortization of purchased intangible assets	324	354
Restructuring expenses	127	1,116
Total costs and expenses	13,623	18,123
Operating (loss) income	(710)	6,347
Other income (expense):
Other income, net	394	115
Interest expense, net	(135)	(238)
(Loss) income before income taxes	(451)	6,224
Income tax (benefit) provision	(883)	2,069
Net income	$ 432	$ 4,155
Net income per share
Basic (in dollars per share)	$ 0.03	$ 0.28
Diluted (in dollars per share)	$ 0.03	$ 0.28
Weighted average shares outstanding:
Basic (in shares)	15,453,103	14,697,164
Diluted (in shares)	15,463,923	14,717,836
Dividends declared per common share (in dollars per share)	$ 0	$ 0.125