XML 39 R27.htm IDEA: XBRL DOCUMENT v3.8.0.1
Marketable Securities - Schedule of Maturities of Marketable Securities (Details)
$ in Thousands
Sep. 30, 2017
USD ($)
Investments, Debt and Equity Securities [Abstract]  
Amortized cost Due within one year $ 3,945
Amortized cost Due after one year through five years 16,475
Amortized cost Total available-for-sale securities 20,420
Estimated fair value Due within one year 3,953
Estimated fair value Due after one year through five years 16,480
Estimated fair value Total available-for-sale securities $ 20,433