Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Additional Information (Details)

v3.7.0.1
Fair Value Measurements - Additional Information (Details)
Jun. 30, 2017
USD ($)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]  
Assets transferred from level 1 to level 2 $ 0
Fair value, re-measured on recurring basis using significant unobservable inputs , assets value 0
Fair value, re-measured on recurring basis using significant unobservable inputs , liabilities value 0
Aggregate carrying value of debt 20,000,000
Level 2  
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]  
Aggregate carrying value of debt 20,000,000
Estimated fair value of debt $ 20,000,000