Quarterly report pursuant to Section 13 or 15(d)

Cash, Cash Equivalents and Investments - Summary of Available-for-sale Securities' Fair Value and Gross Unrealized Losses (Details)

v3.8.0.1
Cash, Cash Equivalents and Investments - Summary of Available-for-sale Securities' Fair Value and Gross Unrealized Losses (Details)
$ in Thousands
Mar. 31, 2018
USD ($)
Fair Value  
Twelve Months or Less $ 17,398
Total 17,398
Gross Unrealized Losses  
Twelve Months or Less (16)
Total (16)
Commercial paper  
Fair Value  
Twelve Months or Less 4,981
Total 4,981
Gross Unrealized Losses  
Twelve Months or Less (1)
Total (1)
Corporate debt securities  
Fair Value  
Twelve Months or Less 12,417
Total 12,417
Gross Unrealized Losses  
Twelve Months or Less (15)
Total $ (15)