RESTRUCTURING CHARGES (Details) |
1 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|
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Sep. 30, 2016
employee
|
Dec. 31, 2018
USD ($)
|
Dec. 31, 2017
USD ($)
|
Dec. 31, 2016
USD ($)
|
|
| Restructuring Charges | ||||
| Number of positions eliminated | employee | 46 | |||
| Restructuring charges | $ 5,770,000 | |||
| Restructuring charges paid or to be paid in cash | 5,000,000 | |||
| Restructuring, asset impairment charges | 319,000 | |||
| Total stock-based compensation expense | $ 7,704,000 | $ 5,987,000 | 7,832,000 | |
| Restructuring related expenses | 0 | 0 | ||
| Restructuring charges | ||||
| Restructuring Charges | ||||
| Total stock-based compensation expense | $ 499,000 | |||
| Accrued restructuring liability | $ 0 | $ 0 | ||
| X | ||||||||||
- Definition Amount of restructuring related expenses. No definition available.
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| X | ||||||||||
- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition The number of positions eliminated during the period as a result of restructuring activities. No definition available.
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| X | ||||||||||
- Definition Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| 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.
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| X | ||||||||||
- Definition Amount, after cash payment, of expenses associated with exit or disposal activities pursuant to an authorized plan and expenses resulting from the write-down of assets. Excludes expenses related to a business combination, a discontinued operation or an asset retirement obligation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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