Quarterly report pursuant to Section 13 or 15(d)

Financial Instruments (Details 2)

v3.19.2
Financial Instruments (Details 2) - USD ($)
Jun. 30, 2019
Dec. 31, 2018
Jun. 30, 2018
Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Derivative Asset $ 218,000 $ 1,623,000 $ 2,462,000 $ 734,000
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Derivative Financial Instruments, Assets [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Derivative Asset 0 0    
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Derivative Financial Instruments, Assets [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Derivative Asset 218,000 1,623,000    
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Derivative Financial Instruments, Assets [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Derivative Asset 0 0    
Estimate of Fair Value Measurement [Member] | Fair Value, Recurring [Member] | Derivative Financial Instruments, Assets [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Derivative Asset $ 218,000 $ 1,623,000