Annual report pursuant to Section 13 and 15(d)

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

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Fair Value of Financial Instruments - Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation (Details) - Fair Value, Input, Level 3 [Member] - USD ($)
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Balance, beginning $ 526,432 $ 603,411
Change in fair value (343,768) 73,271
Payments (182,664) (150,250)
Balance, ending $ 526,432