Business Description And Significant Accounting Policies (Details)	12 Months Ended
	Dec. 31, 2019 USD ($) reporting_unit	Dec. 31, 2018 USD ($)
Business Description And Significant Accounting Policies [Line Items]
Cash held in foreign accounts	$ 327,000	$ 362,000
Trade notes receivable interest rate stated percentage	7.00%
Trade notes receivable repayment period	36 months
Number of reporting units | reporting_unit	1
Goodwill impairment		0
Maximum period in which accounts receivable become due	120 days
Recognized foreign currency transactions gain (loss)	$ (127,000)	72,000
Advertising expense	$ 408,000	314,000
Minimum [Member]
Business Description And Significant Accounting Policies [Line Items]
Estimated useful lives of the equipment and leasehold improvements (in years)	1 year
Warranty period	1 year
Warranty period (in years)	1 year
Maximum [Member]
Business Description And Significant Accounting Policies [Line Items]
Estimated useful lives of the equipment and leasehold improvements (in years)	7 years
Warranty period	3 years
Warranty period (in years)	3 years
Leasehold Improvements [Member] | Minimum [Member]
Business Description And Significant Accounting Policies [Line Items]
Estimated useful lives of the equipment and leasehold improvements (in years)	1 year
Leasehold Improvements [Member] | Maximum [Member]
Business Description And Significant Accounting Policies [Line Items]
Estimated useful lives of the equipment and leasehold improvements (in years)	8 years
Key Tronic Corporation [Member] | Affiliated Entity [Member]
Business Description And Significant Accounting Policies [Line Items]
Sales to related party	$ 20,000	$ 20,000