Fair Value Measurements (Warrants Outstanding) (Details) - USD ($) $ / shares in Units, $ in Thousands |
3 Months Ended | |||
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Mar. 31, 2021 |
Mar. 31, 2020 |
Dec. 31, 2020 |
Jan. 12, 2018 |
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Class of Warrant or Right [Line Items] | ||||
Change in fair value | $ 357 | $ 36 | ||
Class of Warrant or Right, Outstanding | 338,583 | |||
ESW Holdings, Inc. | ||||
Class of Warrant or Right [Line Items] | ||||
Class of Warrant or Right, Outstanding | 925,000 | |||
Hale Capital, LLP | ||||
Class of Warrant or Right [Line Items] | ||||
Class of Warrant or Right, Outstanding | 238,583 | 314,286 | ||
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ 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 | $ 2.43 | |||
Warrants and Rights Outstanding, Maturity Date | Aug. 31, 2028 |
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- Definition Exercise price per share or per unit of warrants or rights outstanding. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition Number of warrants or rights outstanding. No definition available.
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- Definition Amount of unrealized gain (loss) recognized in income for derivative asset (liability) after deduction of derivative liability (asset), measured at fair value using unobservable input (level 3) and still held. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Expiration date of outstanding warrant and right embodying unconditional obligation requiring redemption by transferring asset at specified or determinable date or upon event certain to occur, in CCYY-MM-DD format. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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