Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Income Statement [Abstract]
Net sales	$ 4,050	$ 4,082
Cost of goods sold	3,497	2,991
Gross profit	553	1,091
Operating expenses:
Selling	728	727
General and administrative	1,187	1,466
Research and development	657	665
Total operating expenses	2,572	2,858
Gain on building sale		7,175
(Loss) earnings from operations	(2,019)	5,408
Other Expense - net	(61)	(83)
(Loss) earnings before income taxes	(2,080)	5,325
Provision for income taxes
Net (loss) earnings	$ (2,080)	$ 5,325
Basic net (loss) earnings per share	$ (0.21)	$ 0.56
Diluted net (loss) earnings per share	$ (0.21)	$ 0.53
Basic weighted averages shares outstanding	9,766	9,506
Diluted weighted averages shares outstanding	9,766	10,076