Fair Value Measurements (Warrants Outstanding) (Details)	Jun. 30, 2022 $ / shares shares
Class of Warrant or Right [Line Items]
Class of Warrant or Right, Outstanding	338,583
Hale Capital, LLP
Class of Warrant or Right [Line Items]
Class of Warrant or Right, Outstanding	238,583
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares	$ 2.80
Warrants and Rights Outstanding, Maturity Date	Oct. 21, 2026
iStudy Co., Ltd.
Class of Warrant or Right [Line Items]
Class of Warrant or Right, Outstanding	100,000
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares	$ 2.43
Warrants and Rights Outstanding, Maturity Date	Aug. 31, 2028