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Retirement Savings Plan - Additional Information (Detail) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Employer matching contributions vesting period |  | 2 years |  |
United States |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Employer matching contributions |  |  | $ 600,000 | $ 1,000,000
Canada |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Employer matching contributions |  | $ 0 | $ 26,000 | $ 157,000
Subsequent Event |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Percentage of employees contribution matched by employer | 50.00% |  |  |
Percentage of employees gross pay eligible for employer match | 6.00% |  |  |

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- Definition Defined contribution plan employers matching contribution vesting period. + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition The amount of the cost recognized during the period for defined contribution plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942 + Details
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- Definition Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. + References No definition available. + Details
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- Definition Percentage employer matches of the employee's percentage contribution matched. + References No definition available. + Details
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- Details
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- Details
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