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Organization and Summary of Significant Accounting Policies - Additional Information (Detail) (USD $) | 12 Months Ended |
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Dec. 31, 2013 Reporting_Unit Customer | Dec. 31, 2012 Customer | Dec. 31, 2011 | Jul. 11, 2012
Organization And Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Cash, cash equivalents and investments in marketable securities | $ 262,000,000 |  |  |
Indebtedness | 160,800,000 |  |  |
Senior secured notes, issued | 125,000,000 | 125,000,000 |  |
Senior Secured Notes, interest rate | 12.00% |  |  |
Restricted Cash | 25,000,000 | 25,000,000 |  | 25,000,000
Maximum maturity term of investments in marketable securities to be considered as cash equivalents | Three months |  |  |
Maturity term of investments considered as short-term | Less than one year |  |  |
Number of customers accounted for major accounts receivable | 3 | 4 |  |
Percentage of accounts receivable customers one | 30.00% | 38.00% |  |
Percentage of accounts receivable customers two | 28.00% | 27.00% |  |
Percentage of accounts receivable customers three | 28.00% | 14.00% |  |
Percentage of accounts receivable customers four |  | 11.00% |  |
Number of reporting unit evaluated for goodwill | 1 |  |  |
Impairment charges related to goodwill | 0 | 0 | 0 |
Minimum percentage of amount realized upon ultimate settlement | 50.00% |  |  |
12% Senior Secured Notes Due July 2017 [Member] |  |  |  |
Organization And Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Senior Secured Notes, interest rate | 12.00% |  |  |
Maturity date of senior secured notes | Jul. 15, 2017 |  |  |
Minimum [Member] |  |  |  |
Organization And Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Property and equipment estimated useful lives | 3 |  |  |
Maximum [Member] |  |  |  |
Organization And Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Contingent payment related to royalty obligation | $ 7,000,000 |  |  |
Property and equipment estimated useful lives | 7 |  |  |

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