Income Taxes (Reconciliation of Taxes Provided to Federal Statutory Rate) (Details) - USD ($) $ in Thousands	3 Months Ended										12 Months Ended
	Mar. 31, 2016	[1]	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	[1]	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2014
Income Taxes Reconciliation Of Taxes Provided To Federal Statutory Rate Details
Tax provision at statutory rate											$ (2,029)	$ 1,599	$ 1,285
State income taxes before valuation allowance, net of federal effect											9	269	196
Foreign tax rate differential											(769)	0	0
Research and development credits											(1,253)	(725)	(1,534)
Change in valuation allowance											(1,555)	(1,480)	1,264
Compensation/option differences											(471)	(331)	(264)
Non-deductible compensation											944	746	605
Acquisition costs											230	0	230
Expiring CA NOLs											1,626	1,484	240
Foreign loss not benefited											2,342	1,192	271
Other											79	35	(74)
Total income tax provision	$ (1,498)		$ (557)	$ 423	$ 785	$ 79		$ 627	$ 1,411	$ 672	$ (847)	$ 2,789	$ 2,219

[1] Comparability affected by the decrease in fiscal 2016 and 2015 in the valuation allowance related to the deferred tax asset which resulted in a decrease in the provision for income taxes of $1.1 million and $1.5 million, in the fourth quarter of fiscal 2016 and 2015, respectively.