Shareholder's Equity (Details 1) - Employee Stock Option [Member] - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Changes during the year:
Number of Options, outstanding at the beginning of year	1,297,000	536,000
Number of Options, Granted	30,000	861,000
Number of Options, Exercised
Number of Options, Forfeited	(160,000)	(100,000)
Number of Options, outstanding at end of year	1,167,000	1,297,000
Number of Options, exercisable at year-end	1,037,000	1,097,000
Weighted Average Exercise Price, Options outstanding at the beginning of year	$ 2.34	$ 4.30
Weighted Average Exercise Price, Granted	1.32	1.34
Weighted Average Exercise Price, Exercised
Weighted Average Exercise Price, Forfeited	2.81	4.30
Weighted Average Exercise Price, Options outstanding at end of year	2.24	2.34
Weighted Average Exercise Price, Options exercisable at year-end	$ 2.36	$ 1.35