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Stockholders' Equity and Employee Stock Option Plans RSU and RSA Activity (Details) (USD $)
In Millions, except Share data, unless otherwise specified
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12 Months Ended |
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Dec. 31, 2013
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Dec. 31, 2012
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Dec. 31, 2011
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| RSU and RSA activity [Abstract] |
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| RSU/ RSA Nonvested and outstanding opening balance, Number |
1,929,614 |
2,521,593 |
2,201,169 |
| RSU/ RSA Nonvested and Outstanding Opening balance, Weighted Average Grant Date Fair Value |
$ 6.56 |
$ 8.40 |
$ 8.88 |
| RSU/ RSA, Grants in Period |
419,056 |
700,987 |
1,381,070 |
| RSU/RSA, Grants in Period, Weighted Average Grant Date Fair Value |
$ 2.34 |
$ 3.25 |
$ 8.74 |
| RSU/RSA Vested in Period |
(522,286) |
(977,149) |
(580,075) |
| RSU/ RSA Vested in Period, Weighted Average Grant Date Fair Value |
$ 6.99 |
$ 8.48 |
$ 10.55 |
| RSU/ RSA Forfeited in Period |
(458,287) |
(315,817) |
(480,571) |
| RSU/RSA, Forfeitures, Weighted Average Grant Date Fair Value |
$ 6.19 |
$ 7.80 |
$ 8.96 |
| RSU/ RSA Nonvested and outstanding ending balance, Number |
1,368,097 |
1,929,614 |
2,521,593 |
| RSU/ RSA Nonvested and Outstanding Closing balance, Weighted Average Grant Date Fair Value |
$ 5.22 |
$ 6.56 |
$ 8.40 |
| Total fair value of RSUs vested and released |
$ 1.2 |
$ 3.7 |
$ 5.1 |
| RSU, Vested and Expected to Vest, Outstanding, Number |
1,292,436 |
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| RSU, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value |
$ 2.8 |
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| Share Price |
$ 2.15 |
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