Quarterly report pursuant to Section 13 or 15(d)

Short-term investments, and Fair Value (Details)

v3.10.0.1
Short-term investments, and Fair Value (Details) - Fair Value, Measurements, Recurring [Member]
$ in Thousands
Jun. 30, 2018
USD ($)
Amortized Cost $ 9,874
Estimated Fair Value 9,874
Level 1 [Member] | Mutual Fund [Member] | Available-for-sale Securities [Member]  
Amortized Cost 4,868
Estimated Fair Value 4,868
Level 2 [Member] | Corporate Debt Securities [Member] | Held-to-maturity Securities [Member]  
Amortized Cost 5,006
Estimated Fair Value $ 5,006