XML 72 R19.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Net Loss Per Share | 12 Months Ended
--- | ---
Dec. 31, 2017
Earnings Per Share [Abstract] |
Net Loss Per Share |
10. | Net Loss Per Share
The following securities were excluded from the calculation of diluted net loss per share because their effect would have been anti-dilutive for the three years presented (in thousands):
|  | Years Ended December 31, |
|  | 2017 |  |  | 2016 |  |  | 2015 |
Employee stock options |  |  | 11,550 |  |  |  | 13,660 |  |  |  | 13,583 |
RSUs outstanding |  |  | 1,562 |  |  |  | 1,211 |  |  |  | 865 |
Warrants |  |  | 4 |  |  |  | 4 |  |  |  | 7 |
|  |  | 13,116 |  |  |  | 14,875 |  |  |  | 14,455 |

X
- References No definition available. + Details
Name: | us-gaap_EarningsPerShareAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 + Details
Name: | us-gaap_EarningsPerShareTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration