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Organization and Summary of Significant Accounting Policies - Additional Information (Detail) shares in Millions | 12 Months Ended
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Dec. 31, 2015 USD ($) Customer Reporting_Unit shares | Dec. 31, 2014 USD ($) Customer shares | Dec. 31, 2013 shares
Organization And Summary Of Significant Accounting Policies [Line Items] |  |  |
Cash and investments in marketable securities | $ 308,944,000 | $ 262,824,000 |
Senior secured notes | 250,000,000 |  |
Debt and capital lease obligation | 255,800,000 |  |
Capital lease obligations | 5,800,000 |  |
Capital lease obligations, current portion | $ 4,756,000 | $ 4,512,000 |
Number of customers accounted for major accounts receivable | Customer | 3 | 3 |
Percentage of accounts receivable customers one | 50.00% | 40.00% |
Percentage of accounts receivable customers two | 35.00% | 31.00% |
Percentage of accounts receivable customers three | 10.00% | 15.00% |
Number of reporting unit evaluated for goodwill | Reporting_Unit | 1 |  |
Asset impairment charges | $ 0 |  |
Minimum percentage of amount realized upon ultimate settlement | 50.00% |  |
Stock Options and Restricted Stock Units [Member] |  |  |
Organization And Summary Of Significant Accounting Policies [Line Items] |  |  |
Weighted average diluted securities excluded from diluted net loss per share | shares | 21.1 | 21.9 | 20.7
Minimum [Member] |  |  |
Organization And Summary Of Significant Accounting Policies [Line Items] |  |  |
Property and equipment estimated useful lives | 3 years |  |
Maximum [Member] |  |  |
Organization And Summary Of Significant Accounting Policies [Line Items] |  |  |
Property and equipment estimated useful lives | 10 years |  |

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