Condensed Consolidated Statements of Operations - Unaudited - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Income Statement [Abstract]
REVENUES	$ 7,838	$ 6,157	$ 14,470	$ 12,102
Type of Revenue [Extensible List]	us-gaap:ProductMember	us-gaap:ProductMember	us-gaap:ProductMember	us-gaap:ProductMember
Costs and expenses:
Manufacturing cost of sales	$ 4,706	$ 3,594	$ 8,921	$ 7,310
Engineering, selling and administrative	2,276	2,074	4,259	4,145
OPERATING INCOME	856	489	1,290	647
Other Income:
Interest (expense) income, net		(6)	1	6
Other income, net	117	67	270	91
Total Other Income, Net	117	61	271	97
INCOME BEFORE INCOME TAXES	973	550	1,561	744
Income tax expense	34	78	40	79
NET INCOME	$ 939	$ 472	$ 1,521	$ 665
Basic per share information:
Weighted average shares outstanding	4,888,059	4,698,393	4,857,603	4,697,415
Net income	$ 0.19	$ 0.10	$ 0.31	$ 0.14
Diluted per share information:
Weighted average shares outstanding	4,972,418	4,804,165	4,962,110	4,804,621
Net income	$ 0.19	$ 0.10	$ 0.31	$ 0.14