Long-Term Debt - Additional Information (Details) - USD ($) |
1 Months Ended | 3 Months Ended | 6 Months Ended | |||
|---|---|---|---|---|---|---|
Dec. 31, 2016 |
Jun. 30, 2019 |
Jun. 30, 2019 |
Dec. 31, 2018 |
Jun. 30, 2018 |
Dec. 31, 2017 |
|
| Debt Instrument [Line Items] | ||||||
| Long-term debt, net | $ 3,868,000 | $ 3,868,000 | ||||
| Success fee | $ 250,000 | |||||
| Current share price (in dollars per share) | $ 8.00 | |||||
| Contingent success fee liability | 35,000 | 35,000 | ||||
| Debt covenant, unrestricted cash | 4,546,000 | 4,546,000 | ||||
| Cash | $ 13,262,000 | $ 13,262,000 | $ 7,655,000 | $ 13,890,000 | $ 27,813,000 | |
| Effective interest rate percentage | 10.44% | 10.45% | ||||
| Loan Agreement | ||||||
| Debt Instrument [Line Items] | ||||||
| Maximum borrowing capacity | $ 7,000,000 | |||||
| Debt term | 36 months | |||||
| Long-term debt, net | $ 245,000 | $ 245,000 | ||||
| Accretion of final payment fee of debt | $ 207,000 | |||||
| LIBOR | Loan Agreement | ||||||
| Debt Instrument [Line Items] | ||||||
| Variable rate percentage | 5.41% |
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Debt Covenant, Covenant Compliance, Unrestricted Cash No definition available.
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Amount recognized for the passage of time, typically for liabilities, that have been discounted to their net present values. Excludes accretion associated with asset retirement obligations. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- 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
|
| X | ||||||||||
- Definition Percentage points added to the reference rate to compute the variable rate on the debt instrument. No definition available.
|
| X | ||||||||||
- Definition The average effective interest rate during the reporting period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- 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.
|
| X | ||||||||||
- Definition Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. No definition available.
|
| X | ||||||||||
- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Price of a single share of a number of saleable stocks of a company. No definition available.
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|