Goodwill (Tables)

12 Months Ended

Dec. 31, 2019

Goodwill.

Schedule of change in the carrying amount of goodwill

			Accumulated
	Gross carrying		impairment		Net carrying
	amount		losses		amount
Balance at December 31, 2017	$	38,628,391		—		38,628,391
Acquired goodwill during the period		164,757,821		—		164,757,821
Decrease		(950,000)		—		(950,000)
Balance at December 31, 2018	$	202,436,212		—		202,436,212
Acquired goodwill during the period		65,269,470		—		65,269,470
Receipt of prior escrow payment		(504,000)				(504,000)
Decrease		(411,164)		—		(411,164)
Balance at December 31, 2019	$	266,790,518		—		266,790,518