Unaudited Condensed Statements of Changes in Stockholders' Equity (Parenthetical) - Common Class B [Member]	13 Months Ended
Mar. 31, 2019 $ / shares
Stock dividend per share	$ 0.375
Dividend First [Member]
Stock dividend per share	0.25
Dividend Second [Member]
Stock dividend per share	$ 0.1

Aggregate dividends paid during the period for each share of common stock outstanding.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

Name:	us-gaap_CommonStockDividendsPerShareCashPaid
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration