Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2018

Fair Value Measurements

Schedule of the fair value of assets and liabilities subject to recurring fair value measurements

	Fair Value at September 30, 2018
			Quoted Prices		Significant
			in Active		Other		Significant
			Market for		Observable		Unobservable
	Fair		Identical Assets		Inputs		Inputs
	Value		(Level 1)		(Level 2)		(Level 3)
Corporate bonds:
U.S. corporations	$	6,318,203	$	—	$	6,318,203	$	—
International corporations		1,169,080		—		1,169,080		—
Total	$	7,487,283	$	—	$	7,487,283	$	—

	Fair Value at December 31, 2017
			Quoted Prices		Significant
			in Active		Other		Significant
			Market for		Observable		Unobservable
	Fair		Identical Assets		Inputs		Inputs
	Value		(Level 1)		(Level 2)		(Level 3)
Corporate bonds:
U.S. corporations	$	7,181,942	$	—	$	7,181,942	$	—
International corporations		953,181		—		953,181		—
Total	$	8,135,123	$	—	$	8,135,123	$	—