INVESTMENTS AND FAIR VALUE MEASUREMENTS - Fair Value Hierarchy for Cash Equivalents and Marketable Securities (Detail) - USD ($) $ in Thousands | Sep. 30, 2015 | Dec. 31, 2014 |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Assets, Fair value disclosure | $ 2,913 | $ 13,190 |
Liabilites, Fair value disclosure | 861 | 600 |
Contingent Consideration | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Liabilites, Fair value disclosure | 216 | |
Fair Value, Inputs, Level 1 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Assets, Fair value disclosure | 2,913 | 8,126 |
Liabilites, Fair value disclosure | 0 | 0 |
Fair Value, Inputs, Level 1 | Contingent Consideration | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Liabilites, Fair value disclosure | 0 | |
Fair Value, Inputs, Level 2 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Assets, Fair value disclosure | 0 | 5,064 |
Liabilites, Fair value disclosure | 645 | 600 |
Fair Value, Inputs, Level 2 | Contingent Consideration | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Liabilites, Fair value disclosure | 0 | |
Fair Value, Inputs, Level 3 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Assets, Fair value disclosure | 0 | 0 |
Liabilites, Fair value disclosure | 216 | 0 |
Fair Value, Inputs, Level 3 | Contingent Consideration | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Liabilites, Fair value disclosure | 216 | |
Money market securities | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Assets, Fair value disclosure | 2,413 | 1,281 |
Money market securities | Fair Value, Inputs, Level 1 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Assets, Fair value disclosure | 2,413 | 1,281 |
Money market securities | Fair Value, Inputs, Level 2 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Assets, Fair value disclosure | 0 | 0 |
Money market securities | Fair Value, Inputs, Level 3 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Assets, Fair value disclosure | 0 | 0 |
Certificates of Deposit | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Assets, Fair value disclosure | 500 | 6,845 |
Certificates of Deposit | Fair Value, Inputs, Level 1 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Assets, Fair value disclosure | 500 | 6,845 |
Certificates of Deposit | Fair Value, Inputs, Level 2 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Assets, Fair value disclosure | 0 | 0 |
Certificates of Deposit | Fair Value, Inputs, Level 3 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Assets, Fair value disclosure | 0 | 0 |
Commercial Paper | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Assets, Fair value disclosure | | 2,249 |
Commercial Paper | Fair Value, Inputs, Level 1 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Assets, Fair value disclosure | | 0 |
Commercial Paper | Fair Value, Inputs, Level 2 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Assets, Fair value disclosure | | 2,249 |
Commercial Paper | Fair Value, Inputs, Level 3 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Assets, Fair value disclosure | | 0 |
Corporate Notes | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Assets, Fair value disclosure | | 2,815 |
Corporate Notes | Fair Value, Inputs, Level 1 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Assets, Fair value disclosure | | 0 |
Corporate Notes | Fair Value, Inputs, Level 2 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Assets, Fair value disclosure | | 2,815 |
Corporate Notes | Fair Value, Inputs, Level 3 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Assets, Fair value disclosure | | 0 |
Derivative Liability | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Liabilites, Fair value disclosure | 645 | 600 |
Derivative Liability | Fair Value, Inputs, Level 1 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Liabilites, Fair value disclosure | 0 | 0 |
Derivative Liability | Fair Value, Inputs, Level 2 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Liabilites, Fair value disclosure | 645 | 600 |
Derivative Liability | Fair Value, Inputs, Level 3 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Liabilites, Fair value disclosure | $ 0 | $ 0 |