Commitments and Contingencies (Future Minimum Rental Payments) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Mar. 31, 2016
Operating Leased Assets [Line Items]
2017 (Remaining six months ending March 31, 2017)	$ 1,124		$ 1,124
2018	2,181		2,181
2019	2,175		2,175
2020	1,937		1,937
2021	903		903
Thereafter	59		59
Total future minimum payments due	8,379		8,379		$ 8,434
Less: Sublease rentals	(1,036)		(1,036)		(1,165)
Minimum lease payments, less minimum sublease rentals	7,343		7,343		$ 7,269
Rent expense	500	$ 400	1,100	$ 800
Facilities
Operating Leased Assets [Line Items]
2017 (Remaining six months ending March 31, 2017)	1,048		1,048
2018	2,029		2,029
2019	2,023		2,023
2020	1,848		1,848
2021	903		903
Thereafter	59		59
Total future minimum payments due	7,910		7,910
Equipment
Operating Leased Assets [Line Items]
2017 (Remaining six months ending March 31, 2017)	76		76
2018	152		152
2019	152		152
2020	89		89
2021	0		0
Thereafter	0		0
Total future minimum payments due	$ 469		$ 469