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Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013 | Jan. 30, 2015 | Dec. 31, 2012
Accounting Policies [Line Items] |  |  |  |  |
Description of royalty revenue | We recognize royalty revenue when earned under the terms of our third party royalty arrangements, provided the fees are considered fixed or determinable and realization of payment is probable. Currently, our third party royalties are variable in nature and such amounts are not considered fixed or determinable until we receive notice of amounts earned. Typically, we receive notice of royalty revenues earned on a quarterly basis in the immediate quarter following the royalty reporting period. |  |  |  |
Hosting services minimum range | 1 year |  |  |  |
Hosting services maximum range | 10 years |  |  |  |
Hosting services minimum period | 3 years |  |  |  |
Hosting services maximum period | 6 years |  |  |  |
Research and development expense | $ 29,922,000 | $ 25,743,000 | $ 23,269,000 |  |
Impairments of intangible assets | 0 | 0 | 0 |  |
Impairments of long-lived assets | 0 | 0 | 0 |  |
Purchase of held to maturity securities | $ 30,900,000 |  |  |  |
Grade corporate and municipal bonds, maturity date | 2016 through mid-2017 |  |  |  |
Cost method investment | $ 15,000,000 |  |  |  |
Cash and cash equivalents | 33,087,000 | 206,167,000 | $ 78,876,000 |  | $ 6,406,000
Unbilled receivables | 29,700,000 | 14,800,000 |  |  |
Retention payable after completion of the contract | $ 4,700,000 | $ 4,700,000 |  |  |
Convertible Preferred Stock [Member] | Record Holdings Pty Limited [Member] |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |
Cost method investment |  |  |  | $ 15,000,000 |
Investment percentage |  |  |  | 20.00% |
Minimum [Member] |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |
Vesting period (in years) | 3 years |  |  |  |
Percentage of retention of billing | 5.00% |  |  |  |
Maximum [Member] |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |
Vesting period (in years) | 6 years |  |  |  |
Percentage of retention of billing | 20.00% |  |  |  |
Stock Option Plan [Member] |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |
Contractual term (in years) | 10 years |  |  |  |

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