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Long-Term Debt (Convertible Notes, Capital Leases) (Narrative) (Details)		3 Months Ended
	Jan. 21, 2016 USD ($)	Mar. 31, 2017 USD ($) $ / shares	Mar. 01, 2016 USD ($)	Aug. 31, 2011 USD ($)
Debt Instrument [Line Items]
Net present value of the minimum lease payments, at inception		$ 1,995,000	$ 300,000
Amortization of capital lease assets		$ 100,000
Minimum [Member]
Debt Instrument [Line Items]
Capital lease term applicable to depreciate capital assets and obligations		3 years
Maximum [Member]
Debt Instrument [Line Items]
Capital lease term applicable to depreciate capital assets and obligations		5 years
Convertible Notes [Member] \| Gorbert Inc. [Member]
Debt Instrument [Line Items]
Debt instrument, face amount	$ 20,000,000
Debt instrument, maturity date		Mar. 17, 2019
Aggregate principal payment required if maturity date extend to March 17, 2020	2,000,000
Aggregate principal payment required if maturity date extend to March 17, 2021	$ 2,000,000
Convertible Notes [Member] \| Gorbert Inc. [Member] \| Through and Including August 17, 2017 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	5.00%
Convertible Notes [Member] \| Gorbert Inc. [Member] \| From and After August 18, 2017 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	6.00%
Convertible Notes [Member] \| North Jackson Facility [Member]
Debt Instrument [Line Items]
Debt instrument, face amount				$ 20,000,000
Convertible Notes If Holder Elects to Convert on or Prior to August 17, 2017 [Member] \| Gorbert Inc. [Member]
Debt Instrument [Line Items]
Conversion stock price \| $ / shares		$ 47.1675
Debt instrument integral multiple convertible principal amount	$ 100,000
Debt instrument, initial conversion rate per $1000 principal amount	21.2
Principal amount used to convert convertible notes	$ 1,000