Quarterly Data (Tables)

12 Months Ended

Dec. 31, 2017

Quarterly Financial Information Disclosure [Abstract]

Quarterly Data

Quarters (000's omitted, except per share data)
2017	First		Second		Third		Fourth			Total
Net sales	$	27,745	$	38,849	$	33,785	$	30,171		$	130,550
Cost of goods sold		17,181		24,366		21,559		19,545			82,651
Gross profit		10,564		14,483		12,226		10,626			47,899
Net income		659		2,846		1,202		(655	)		4,052
Basic earnings per share	$	0.20	$	0.85	$	0.36	$	(0.20	)	$	1.21
Diluted earnings per share	$	0.18	$	0.75	$	0.32	$	(0.16	)	$	1.09
Dividends per share	$	0.10	$	0.11	$	0.11	$	0.11		$	0.43
2016		First		Second		Third		Fourth			Total
Net sales	$	25,288	$	40,997	$	31,913	$	26,377		$	124,574
Cost of goods sold		16,103		26,302		20,050		16,564			79,019
Gross profit		9,185		14,695		11,863		9,813			45,555
Net income		565		3,267		1,473		545			5,851
Basic earnings per share	$	0.17	$	0.98	$	0.44	$	0.16		$	1.76
Diluted earnings per share	$	0.16	$	0.91	$	0.40	$	0.15		$	1.64
Dividends per share	$	0.10	$	0.10	$	0.10	$	0.10		$	0.40