Organization and Summary of Significant Accounting Policies (Details Textual) - USD ($) $ in Thousands |
3 Months Ended | ||
|---|---|---|---|
Mar. 31, 2018 |
Mar. 31, 2017 |
Mar. 31, 2016 |
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| Schedule of Organization and Summary of Significant Accounting Policies [Line Items] | |||
| Less change in fair value of warrant liability | $ 0 | $ 422 | |
| Investments, Fair Value Disclosure | $ 3,500 | ||
| Warrant Expiration Date | Apr. 18, 2018 | ||
| Adjustments for New Accounting Pronouncement [Member] | |||
| Schedule of Organization and Summary of Significant Accounting Policies [Line Items] | |||
| Deferred Tax Assets Unrecognized Tax Benefit | $ 12,000 | ||
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- Definition The amount of unrecognized tax benefit recognized in deferred tax assets. No definition available.
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- Definition Schedule of organization and summary of significant accounting policies. No definition available.
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- Definition It represents the expiration date of warrant. No definition available.
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- Definition Amount of expense (income) related to adjustment to fair value of warrant liability. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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