Shareholders' Equity - Schedule of Activity Under Stock Option Plans (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	May 31, 2011	Dec. 31, 2005
2005 Plan
Schedule of options granted
Maximum number of shares under the plan	3,000,000			3,000,000	1,500,000
Number of Options Outstanding Beginning Balance	54,000	492,000
Number of Options Exercised	(54,000)	(376,000)
Number of Options Cancelled/Expired		(62,000)
Number of Options Outstanding Ending Balance		54,000	492,000
Number of Options Exercisable		54,000
Available for Issuance Number of Options Ending Balance	0
Weighted Average Exercise Price
Outstanding Weighted Average Exercise Price Beginning Balance	$ 0.79	$ 0.73
Weighted Average Exercise Price Exercised		0.70
Weighted Average Exercise Price Cancelled/Expired		0.86
Outstanding Weighted Average Exercise Price Ending Balance		0.79	$ 0.73
Weighted Average Exercise Price Exercisable Ending Balance		$ 0.79
Weighted Average Remaining Contractual Life
Weighted Average Remaining Contractual Life Options Outstanding		4 months 24 days	3 years 9 months 18 days
Weighted Average Remaining Contractual Life Options Exercisable		4 months 24 days
Aggregate Intrinsic Value
Outstanding Aggregate Intrinsic Value		$ 95	$ 1,067
Aggregate Intrinsic Value Exercisable		$ 95
2015 Plan
Schedule of options granted
Maximum number of shares under the plan	2,000,000
Number of Options Outstanding Beginning Balance	706,000	785,000
Number of Options Granted		235,000
Number of Options Exercised		(147,000)
Number of Options Cancelled/Expired	(31,000)	(167,000)
Number of Options Outstanding Ending Balance	675,000	706,000	785,000
Number of Options Exercisable	526,000	422,000
Available for Issuance Number of Options Ending Balance	1,325,000	1,294,000
Weighted Average Exercise Price
Outstanding Weighted Average Exercise Price Beginning Balance	$ 1.66	$ 1.32
Weighted Average Exercise Price Granted		2.26
Weighted Average Exercise Price Exercised		1.25
Weighted Average Exercise Price Cancelled/Expired	1.90	1.25
Outstanding Weighted Average Exercise Price Ending Balance	1.66	1.66	$ 1.32
Weighted Average Exercise Price Exercisable Ending Balance	$ 1.51	$ 1.44
Weighted Average Remaining Contractual Life
Weighted Average Remaining Contractual Life Options Outstanding	3 years 7 months 6 days	4 years 8 months 12 days	6 years 4 months 24 days
Weighted Average Remaining Contractual Life Options Exercisable	3 years 4 months 24 days	4 years 4 months 24 days
Aggregate Intrinsic Value
Outstanding Aggregate Intrinsic Value	$ 231	$ 660	$ 1,238
Aggregate Intrinsic Value Exercisable	$ 226	$ 473