Income Tax Disclosure [Abstract] | Period [Axis] |
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2015-01-01 - 2015-12-31 |
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Income Tax Disclosure [Abstract] | |
Domestic and Foreign (Loss)/Income Before Provision for Income Taxes |
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2015
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2014
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2013
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(in thousands)
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Domestic
|
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$
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(55,900)
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|
$
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(22,037)
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$
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(63,421)
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Foreign
|
|
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(15,670)
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|
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(16,449)
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|
|
410
|
|
Loss before provision for income taxes
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$
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(71,570)
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$
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(38,486)
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$
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(63,011)
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|
Provision for Income Taxes |
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2015
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2014
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2013
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(in thousands)
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Current:
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|
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|
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Federal
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$
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(20)
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$
|
233
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$
|
-
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State
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122
|
|
|
-
|
|
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44
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Foreign
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1,166
|
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|
892
|
|
|
303
|
|
|
|
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1,268
|
|
|
1,125
|
|
|
347
|
|
Deferred:
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|
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Federal
|
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238
|
|
|
-
|
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-
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State
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39
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|
-
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|
-
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Foreign
|
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224
|
|
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(226)
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|
|
-
|
|
|
|
|
501
|
|
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(226)
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|
|
-
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|
Provision for income taxes
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$
|
1,769
|
|
$
|
899
|
|
$
|
347
|
|
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Components of Deferred Tax Assets and Deferred Tax Liabilities |
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December 31,
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2015
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2014
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(in thousands)
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Deferred tax assets:
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|
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|
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Net operating loss carryforwards
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$
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60,325
|
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$
|
56,794
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Research and development credits
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|
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34,744
|
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28,509
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Stock compensation
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19,444
|
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16,620
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Capitalized research expenses
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2,551
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3,695
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Impairment loss on available for sale securities/capital loss carryforward
|
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|
679
|
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|
685
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Intangible assets
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1,882
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-
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Other temporary differences
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10,391
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|
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5,070
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Total gross deferred tax assets
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|
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130,016
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111,373
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Valuation allowance
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(121,072)
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|
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(100,586)
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Net deferred tax assets
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$
|
8,944
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$
|
10,787
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Deferred tax liabilities:
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|
|
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Convertible Notes
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$
|
(8,560)
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$
|
(10,079)
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Other temporary differences
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(661)
|
|
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(485)
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Total deferred tax liabilities
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$
|
(9,221)
|
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$
|
(10,564)
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Net deferred tax (liabilities) assets
|
|
$
|
(277)
|
|
$
|
223
|
|
Reported as:
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Short-term deferred tax assets
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$
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-
|
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$
|
402
|
|
Long-term deferred tax liabilities
|
|
|
(277)
|
|
|
(179)
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Net deferred tax (liabilities) assets
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|
$
|
(277)
|
|
$
|
223
|
|
|
Summary of Statutory Tax Rates and Effective Tax Rates |
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December 31,
|
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2015
|
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2014
|
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2013
|
|
Statutory rate benefit
|
|
(35)
|
%
|
(35)
|
%
|
(35)
|
%
|
State and local income tax benefit (net of federal tax benefit)
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(1)
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(1)
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(2)
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|
Foreign rate differential
|
|
4
|
|
6
|
|
-
|
|
Credits
|
|
(7)
|
|
3
|
|
(11)
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Stock compensation
|
|
5
|
|
9
|
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-
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NOL accrual to return
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|
-
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(3)
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|
-
|
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Fines and penalties
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|
6
|
|
-
|
|
-
|
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Other
|
|
1
|
|
2
|
|
7
|
|
Valuation allowance
|
|
29
|
|
21
|
|
42
|
|
Effective tax rate
|
|
2
|
%
|
2
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%
|
1
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%
|
|