Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2017

Equity [Abstract]

Summary of Stockholders' Equity

	Shares of common stock
	Class A		Class B
	Issued andoutstanding		Issued andoutstanding
Balance at December 31, 2014		2,404,107		10,000,000
Issued		7,000		-
Balance at December 31, 2015		2,411,107		10,000,000
Issued		8,000		-
Balance at December 31, 2016		2,419,107		10,000,000
Issued		7,000		-
Balance at December 31, 2017		2,426,107		10,000,000