Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - Summary of Net Cash Proceeds from Exercise of Stock Options Less Shares Used for Minimum Withholding Taxes and Intrinsic Value of Options Exercised (Detail)

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Stock-Based Compensation - Summary of Net Cash Proceeds from Exercise of Stock Options Less Shares Used for Minimum Withholding Taxes and Intrinsic Value of Options Exercised (Detail)
$ in Thousands
3 Months Ended
Mar. 31, 2019
USD ($)
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]  
Net cash proceeds $ 125
Intrinsic value of options exercised $ 353