Quarterly report pursuant to Section 13 or 15(d)

Financial Instruments - Additional Information (Details Textuals)

v3.20.1
Financial Instruments - Additional Information (Details Textuals) - USD ($)
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2018
Fair Value Disclosures [Abstract]      
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Other Comprehensive Income (Loss) $ (194,000) $ (618,000)  
Fair Value, Assets, Level 2 to Level 1 Transfers, Amount $ 0   $ 0