Annual report pursuant to Section 13 and 15(d)

Fair Value Measurements - Additional Information (Details)

v3.19.1
Fair Value Measurements - Additional Information (Details) - USD ($)
Dec. 31, 2018
Dec. 31, 2017
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Assets transferred from level 1 to level 2 $ 0 $ 0
Fair value, re-measured on recurring basis using significant unobservable inputs , assets value 0 0
Fair value, re-measured on recurring basis using significant unobservable inputs , liabilities value 0 0
Aggregate carrying value of debt 19,809,511 20,000,000
Level 2    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Aggregate carrying value of debt $ 18,877,333 $ 18,970,317