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Selected Statement of Operations Data (Tables)

12 Months Ended

Dec. 31, 2019

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of revenues classified by product lines

		Years ended December 31,
		2 0 1 9				2 0 1 8				2 0 1 7
		U.S. dollars in thousands
Product line "A"		$	13,591			$	14,923			$	14,722
Product line "B"			2,956				3,212				3,340
Product line "C"			6,117				-				-
		$	22,664			$	18,135			$	18,062

Schedule of geographical revenues classified by geographical location of the customers

		Years ended December 31,
		2 0 1 9				2 0 1 8				2 0 1 7
		U.S. dollars in thousands
The Americas		$	12,030			$	13,130			$	12,995
Europe			8,839				3,328				3,181
Israel			1,272				884				977
Other			523				793				909
		$	22,664			$	18,135			$	18,062

Schedule of financial income (expense) - net

		Years ended December 31,
		2 0 1 9				2 0 1 8				2 0 1 7
		U.S. dollars in thousands
Income:
Interest on bank deposits and short-term investments		$	219			$	208			$	75
Non-dollar currency gains, net			89				-				415
Income from marketable securities			165				77				136
Realized gain from sale of available-for-sale securities			24				28				-
Interest on available-for-sale securities			-				27				42
			497				340				668

Expenses:
Non-dollar currency losses, net			-				(107	)			-
Realized loss from sale of available-for-sale securities			-				-				(24	)
Bank commissions and charges			(14	)			(11	)			(14	)
			(14	)			(118	)			(38	)
		$	483			$	222			$	630

Schedule of earnings per ordinary share (''EPS'')

		Years ended December 31,
		2 0 1 9				2 0 18				2 0 1 7
		In thousands
Weighted average number of shares issued and outstanding - used in computation of basic EPS			19,746				19,344				19,292
Add - incremental shares from assumed exercise of options			216				217				267
Weighted average number of shares used in computation of diluted EPS			19,962				19,561				19,559

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Tabular disclosure of the components of non-operating income or non-operating expense that may include amounts earned from dividends, interest on securities, gains (losses) on securities sold, equity earnings of unconsolidated affiliates, net gain (loss) on sales of business, interest expense and other miscellaneous income or expense items.

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Tabular disclosure of product information that are included in the discussion of the nature of an entity's operations.

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Tabular disclosure of the names of foreign countries from which revenue is material and the amount of revenue from external customers attributed to those countries. An entity may also provide subtotals of geographic information about groups of countries.

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-Name Accounting Standards Codification
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Tabular disclosure of the weighted average number of shares used in calculating basic net earnings per share (or unit) and diluted earnings per share (or unit).

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