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Arrangements [Line Items] Lease Expiration, Period [Axis] Lease Expiration, Period [Axis] Lease Expiration, Period Security Exchange Name Security Exchange Name Total liabilities Liabilities Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Period Two Period Two [Member] Period Two Operating expenses: Less: Operating Expenses [Abstract] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Decrease in fair value recorded as a loss on investment in affiliated entity Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings Issuance of common stock for cash, net of financing costs Stock Issued During Period, Value, New Issues Statement [Line Items] Statement [Line Items] Number of agreements to sublease Lessee, Operating Lease, Number Of Agreements To Sublease Lessee, Operating 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