Fair Value Measurements (Details) - USD ($) $ in Thousands		Sep. 30, 2017	Mar. 31, 2017
LIABILITIES
Fair value of contingent consideration		$ 0	$ 18,817
Fair Value, Measurements, Recurring [Member]
ASSETS
Cash and cash equivalents	[1]	26,553	37,673
Restricted cash and cash equivalents		6,488	4,916
Total		33,041	42,589
LIABILITIES
Fair value of contingent consideration			18,817
Total			18,817
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value, Measurements, Recurring [Member]
ASSETS
Cash and cash equivalents	[1]	26,553	37,673
Restricted cash and cash equivalents		6,488	4,916
Total		33,041	42,589
LIABILITIES
Fair value of contingent consideration			0
Total			0
Significant Other Observable Inputs (Level 2) [Member] | Fair Value, Measurements, Recurring [Member]
ASSETS
Cash and cash equivalents	[1]	0	0
Restricted cash and cash equivalents		0	0
Total		0	0
LIABILITIES
Fair value of contingent consideration			18,817
Total			18,817
Unobservable Inputs (Level 3) [Member] | Fair Value, Measurements, Recurring [Member]
ASSETS
Cash and cash equivalents	[1]	0	0
Restricted cash and cash equivalents		0	0
Total		$ 0	0
LIABILITIES
Fair value of contingent consideration			0
Total			$ 0

[1] Cash equivalents consist primarily of money market funds.