Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Changes in level 3 instruments (Details)

v3.19.3
Summary of Significant Accounting Policies - Changes in level 3 instruments (Details) - Fair Value, Measurements, Recurring [Member] - Fair Value, Inputs, Level 3 [Member] - Contingent consideration [Member] - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2019
Balance, Beginning $ (520,000) $ (520,000)
Change in fair value 0 0
Balance, Ending $ (520,000) $ (520,000)