Subsequent Events - Amendments to the Company's Certificate of Incorporation (Details)	Jul. 20, 2018 USD ($) shares	Jun. 02, 2018 vote
Subsequent Event
Subsequent Event [Line Items]
Number of shares owned by immediate family members and/or permitted transferee's (in shares)	4,600,000
Number of shares expected to be held (in shares)	12,000,000
Percent discount on sale of stock	6.00%
Business-day volume weighted average price, period	20 days
Percent of costs to be paid	50.00%
Percent of costs to be paid, parent participates	100.00%
Maximum fees to be reimbursed to the family | $	$ 750,000
Class A Convertible Common Stock
Subsequent Event [Line Items]
Number of votes per share of stock | vote		10
Class A Convertible Common Stock | Subsequent Event
Subsequent Event [Line Items]
Number of shares owned by immediate family members and/or permitted transferee's (in shares)	4,300,000
Common Stock
Subsequent Event [Line Items]
Number of votes per share of stock | vote		1