Organization and Summary of Significant Accounting Policies (Details Textual) - USD ($) |
3 Months Ended | |||
|---|---|---|---|---|
Mar. 31, 2019 |
Jan. 31, 2019 |
Dec. 31, 2018 |
Mar. 31, 2018 |
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| Schedule of Organization and Summary of Significant Accounting Policies [Line Items] | ||||
| Less change in fair value of warrant liability | $ 0 | |||
| Cash and Cash Equivalents, at Carrying Value | $ 5,909,000 | $ 9,295,000 | $ 3,465,000 | |
| Common Stock, Par or Stated Value Per Share | $ 0.001 | |||
| Lease Expiration Date | Jun. 30, 2021 | |||
| Accounting Standards Update 2016-02 [Member] | ||||
| Schedule of Organization and Summary of Significant Accounting Policies [Line Items] | ||||
| Lessee, Operating Lease, Discount Rate | 12.00% | |||
| Fair Value, Recurring [Member] | Money Market Funds [Member] | ||||
| Schedule of Organization and Summary of Significant Accounting Policies [Line Items] | ||||
| Cash and Cash Equivalents, Fair Value Disclosure | $ 5,000,000 | $ 8,900,000 |
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- Definition Schedule of organization and summary of significant accounting policies. No definition available.
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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. No definition available.
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- Definition Face amount or stated value per share of common stock. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of expense (income) related to adjustment to fair value of warrant liability. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Date which lease or group of leases is set to expire, in CCYY-MM-DD format. No definition available.
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- Definition Discount rate used by lessee to determine present value of operating lease payments. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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