Quarterly report pursuant to Section 13 or 15(d)

Financial Instruments - Additional Information (Details Textuals)

v3.10.0.1
Financial Instruments - Additional Information (Details Textuals)
3 Months Ended 6 Months Ended
Jun. 30, 2018
USD ($)
Jun. 30, 2018
USD ($)
Fair Value Disclosures [Abstract]    
Fair Value, Assets, Level 2 to Level 1 Transfers, Amount $ 0 $ 0
Fair Value, Assets, Level 1 to Level 2 Transfers, Amount 0 0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net $ 0 $ 0