Fair Value Measurement - Change In Fair Value Measurement (Details) - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Fair Value Disclosures [Abstract]
Balance at December 31, 2019	$ 16,055,937
Other than temporary investements on bond portfolio		$ (50,000)
Purchases	1,452,000
Proceeds	(59,000)
Balance at March 31, 2020	$ 17,448,937