Significant Accounting Policies (Details Narrative) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2019	Dec. 31, 2018	Jan. 02, 2019
Allowance for doubtful accounts receivable	$ 946	$ 985
Investments	22,898	14,944
Operating lease assets	770		$ 800
Operating lease liability	$ 789		$ 800
Income tax rate examination description	This included the effects of the change in the US Corporate tax rate from 35% to 21% on deferred tax assets and liabilities, and a provision related to previously deferred taxes on earnings of the Company's foreign subsidiary. The Company's tax expense for the periods ended June 30, 2019 and 2018 included the continuing effect of the reduction in the U.S. federal tax rate from 35% to 21%, effective for those respective tax years.
Corporate tax rate percentage	21.00%	35.00%
Concentration risk percentage description	The Company has one significant customer which represented more than 10% of the Company's Accounts Receivable at June 30, 2019 and December 31, 2018. That same customer represented more than 10% of the Company's total Net Sales for the six months ended June 30, 2019 and 2018.	The Company has one significant customer which represented more than 10% of the Company's Accounts Receivable at June 30, 2019 and December 31, 2018. That same customer represented more than 10% of the Company's total Net Sales for the six months ended June 30, 2019 and 2018.
Minimum [Member]
Defense costs per claim	$ 25
Maximum [Member]
Defense costs per claim	$ 1,000