Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements (Details)

v3.8.0.1
Fair Value Measurements (Details) - Recurring [Member] - Cash and cash equivalents [Member] - USD ($)
$ in Thousands
Dec. 31, 2017
Mar. 31, 2017
Assets and liabilities measured at fair value on a recurring basis and their related valuation inputs    
Money market funds $ 12,724 $ 17,162
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]    
Assets and liabilities measured at fair value on a recurring basis and their related valuation inputs    
Money market funds $ 12,724 $ 17,162