Shareholder's Equity (Details 1) - $ / shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Changes during the year:
Number of Options, Granted	100,000
Employee Stock Option [Member]
Changes during the year:
Number of Options, outstanding at the beginning of year	536,000	746,000
Number of Options, Granted	861,000
Number of Options, Exercised
Number of Options, Forfeited	(100,000)	(310,000)
Number of Options, outstanding at end of year	1,297,000	536,000
Number of Options, exercisable at year-end	1,097,000	461,000
Weighted Average Exercise Price, Options outstanding at the beginning of year	$ 4.30	$ 4.30
Weighted Average Exercise Price, Granted	1.34	4.30
Weighted Average Exercise Price, Exercised
Weighted Average Exercise Price, Forfeited	4.30	4.30
Weighted Average Exercise Price, Options outstanding at end of year	2.34	4.30
Weighted Average Exercise Price, Options exercisable at year-end	$ 1.35	$ 4.30