Fair Value Measurements - Change in Level 3 Assets (Details) - Fair Value, Measurements, Recurring |
9 Months Ended |
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Sep. 30, 2017
USD ($)
trading_day
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | |
| Unrealized loss recognized in other comprehensive loss | $ (184,998) |
| Eurosite Power Inc | |
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | |
| Unrealized loss recognized in other comprehensive loss | $ (184,998) |
| Eurosite Power Inc | Level 3 | |
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | |
| Number of trading days included in fair value measurement | trading_day | 15 |
| Fair value at September 30, 2017 | $ 334,570 |
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- Definition Number of Trading Days Included in Fair Value Measurement No definition available.
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- Definition Amount of equity securities categorized neither as held-to-maturity nor as trading. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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 Amount after tax and reclassification adjustments, of appreciation (loss) in value of unsold available-for-sale securities. Excludes amounts related to other than temporary impairment (OTTI) loss. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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