Fair Value Measurements and Derivative Instruments Reporting (Narrative) (Details) CAD in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2017 USD ($)	Mar. 31, 2016 USD ($)	Dec. 31, 2016 USD ($)	Mar. 31, 2017 CAD	Mar. 31, 2017 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value on a nonrecurring basis			$ 0		$ 0
Cash equivalents			0		0
Operating expenses	$ 31,908,000	$ 29,145,000
Katowice Leashold Improvements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value on a nonrecurring basis					0
Operating expenses			$ 400,000
BMO Credit Agreement [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notional Value					$ 6,600,000
BMO Credit Agreement [Member] | Interest Rate Swap Liability [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt instrument maturity date	Aug. 01, 2019
Notional Value | CAD				CAD 8.8
CDOR exchange rate				3.92	3.92