Shareholders' Equity - Schedule of Activity Under Stock Option Plans (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	May 31, 2011	Dec. 31, 2005
Schedule of options granted
Maximum number of shares under the plan				3,000,000
2005 Plan
Schedule of options granted
Maximum number of shares under the plan	3,000,000				1,500,000
Number of Options Outstanding Beginning Balance	492,000	628,000
Number of Options Exercised	(376,000)	(136,000)
Number of Options Cancelled/Expired	(62,000)
Number of Options Outstanding Ending Balance	54,000	492,000	628,000
Number of Options Exercisable	54,000	397,000
Weighted Average Exercise Price
Outstanding Weighted Average Exercise Price Beginning Balance	$ 0.73	$ 0.63
Weighted Average Exercise Price Exercised	0.70	0.26
Weighted Average Exercise Price Cancelled/Expired	0.86
Outstanding Weighted Average Exercise Price Ending Balance	0.79	0.73	$ 0.63
Weighted Average Exercise Price Exercisable Ending Balance	$ 0.79	$ 0.70
Weighted Average Remaining Contractual Life
Weighted Average Remaining Contractual Life Options Outstanding	4 months 24 days	3 years 9 months 18 days	3 years 9 months 18 days
Weighted Average Remaining Contractual Life Options Exercisable	4 months 24 days	3 years 1 month 6 days
Aggregate Intrinsic Value
Outstanding Aggregate Intrinsic Value	$ 95	$ 1,067	$ 510
Aggregate Intrinsic Value Exercisable	$ 95	$ 872
2015 Plan
Schedule of options granted
Maximum number of shares under the plan	2,000,000
Number of Options Outstanding Beginning Balance	785,000	788,000
Number of Options Granted	235,000	47,000
Number of Options Exercised	(147,000)
Number of Options Cancelled/Expired	(151,000)	(50,000)
Number of Options Outstanding Ending Balance	722,000	785,000	788,000
Number of Options Exercisable	422,000	422,000
Available for Issuance Number of Options Ending Balance	1,278,000	1,215,000
Weighted Average Exercise Price
Outstanding Weighted Average Exercise Price Beginning Balance	$ 1.32	$ 1.27
Weighted Average Exercise Price Granted	2.26	2.18
Weighted Average Exercise Price Exercised	1.25
Weighted Average Exercise Price Cancelled/Expired	1.25	1.26
Outstanding Weighted Average Exercise Price Ending Balance	1.66	1.32	$ 1.27
Weighted Average Exercise Price Exercisable Ending Balance	$ 1.44	$ 1.31
Weighted Average Remaining Contractual Life
Weighted Average Remaining Contractual Life Options Outstanding	4 years 8 months 12 days	6 years 4 months 24 days	7 years 2 months 12 days
Weighted Average Remaining Contractual Life Options Exercisable	4 years 4 months 24 days	6 years
Aggregate Intrinsic Value
Outstanding Aggregate Intrinsic Value	$ 660	$ 1,238	$ 136
Aggregate Intrinsic Value Exercisable	$ 473	$ 673