Income Taxes (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Tax Reform [Line Items]
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount	$ 1,578,000
Prepaid Taxes	4,269,000	$ 0
Repatriation Earnings and Profits	$ 33,000,000
U.S. Federal corporate tax rate	35.00%	35.00%	35.00%
Penalties and interest	$ 181,000	$ 101,000	$ 119,000
Foreign Earnings Repatriated	20,000,000
Unrecognized deferred tax liability	1,000,000
Uncertain tax position	160,000	2,462,000	$ 1,629,000
Reasonably possible maximum decrease in uncertain tax position	160,000
Decrease in income tax provision	127,000
Additions for tax positions related to the current year	67,000	354,000
Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Amount	1,767,000
Taxes Payable	1,100,000
Accrued Income Taxes, Noncurrent	1,017,000	$ 0
Tax Year 2017 [Member]
Tax Reform [Line Items]
Prepaid Taxes	$ 88,000