Income Taxes (Narrative) (Details) - USD ($)	3 Months Ended	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Operating Loss Carryforwards [Line Items]
Projected income tax benefit		$ 3,334,000
Estimated foreign earnings and profits tax expense	$ 10,100,000	13,104,000
Current foreign earnings and profits tax liability	1,048,000	$ 1,048,000
Federal statutory percentage rate		35.00%	35.00%	35.00%
Additional unrecognized tax benefit that would affect our annual effective tax rate	234,000	$ 234,000	$ 235,000
Withholding taxes	2,540,000	$ 2,540,000
Federal
Operating Loss Carryforwards [Line Items]
Federal statutory percentage rate		35.00%
Foreign
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards with unlimited carryforward period	10,680,000	$ 10,680,000
Net operating loss carryforwards expiring in 2035	3,759,000	3,759,000
Valuation allowance release in Canada related to restructuring		147,000
State
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	$ 4,602,000	$ 4,602,000