CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Statement of Comprehensive Income
Sales	$ 32,944	$ 35,298
Cost of sales	(20,871)	(22,956)
Gross profit	12,073	12,342
Operating expenses:
Selling, general and administrative	(7,115)	(6,633)
Research and development	(2,344)	(2,262)
Pension	(262)	(522)
Pension settlement		(3,620)
Total operating expenses	(9,721)	(13,037)
Operating income (loss)	2,352	(695)
Interest expense	(510)	(429)
Other expense, net	(6)	(163)
Income (loss) before income tax benefit (provision)	1,836	(1,287)
Income tax benefit (provision)	(93)	12
Net income (loss)	$ 1,743	$ (1,275)
Net income (loss) per common share - basic	$ 0.16	$ (0.11)
Net income (loss) per common share - diluted	$ 0.15	$ (0.11)
Weighted average common shares outstanding - basic	11,214	11,150
Weighted average common shares outstanding - diluted	11,836	11,150
Comprehensive income, net of tax:
Net income (loss)	$ 1,743	$ (1,275)
Pension settlement		31,776
Decrease (increase) in minimum pension liability	258	(555)
Other comprehensive income	258	31,221
Total comprehensive income	$ 2,001	$ 29,946