Long-term Debt (Details Narrative) $ in Thousands	12 Months Ended
Dec. 31, 2018 USD ($) Number
Debt Instrument [Line Items]
Long-term Debt, Maturities, 2018	$ 23,200
Long-term Debt, Maturities, 2019	11,600
Long-term Debt, Maturities, 2020	11,600
Long-term Debt, Maturities, thereafter through 2033	1,100
1.2% Loans Payable [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 111,000
Debt Instrument, Term	5 years
Debt Instrument, Interest Rate During Period	1.20%
Debt Instrument, Frequency of Periodic Payment	Quarterly
Number of installment \| Number	20
4.1% Loans Payable [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 15,000
Debt Instrument, Interest Rate During Period	4.10%
Debt Instrument, Frequency of Periodic Payment	Annual
Installments	$ 1,100
Number of installment \| Number	14

Represents the number of installment.

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- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

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Description of the frequency of periodic payments (monthly, quarterly, annual).

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- Definition

The average effective interest rate during the reporting period.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Amount of the required periodic payments including both interest and principal payments.

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- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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