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RESTRUCTURINGS - 2013 RESTRUCTURING (Details) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2015 USD ($) | Dec. 31, 2013 USD ($) | Apr. 25, 2013 position
RESTRUCTURING |  |  |
Restructuring charges | $ 1,306,000 | $ 1,462,000 |
Proceeds from sales of property and equipment |  | 1,196,000 |
April 2013 Restructuring |  |  |
RESTRUCTURING |  |  |
Number of positions eliminated, inception to date | position |  |  | 20
Restructuring charges |  | 1,370,000 |
Cash payments |  | 1,085,000 |
April 2013 Restructuring | One-time termination benefits |  |  |
RESTRUCTURING |  |  |
Restructuring charges |  | 624,000 |
Non-cash stock-based compensation expense |  | 28,000 |
April 2013 Restructuring | Asset Write Downs |  |  |
RESTRUCTURING |  |  |
Restructuring charges |  | 200,000 |
April 2013 Restructuring | Facility Related Charges |  |  |
RESTRUCTURING |  |  |
Restructuring charges |  | 546,000 |
Proceeds from sales of property and equipment |  | $ 1,080,000 |

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