Quarterly report pursuant to Section 13 or 15(d)

Fair Value of Financial Instruments - Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation (Details)

v3.19.1
Fair Value of Financial Instruments - Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation (Details) - Fair Value, Input, Level 3 [Member] - USD ($)
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Balance, beginning $ 526,432 $ 603,411
Change in fair value (64,203) 31,749
Payments (154,844) (47,111)
Balance, ending $ 307,385 $ 588,049