Income Taxes (Reconciliation of Taxes Provided to Federal Statutory Rate) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Income Taxes Reconciliation Of Taxes Provided To Federal Statutory Rate Details
Tax provision at statutory rate									$ (1,652)	$ (2,029)	$ 1,599
State income taxes before valuation allowance, net of federal effect									108	9	269
Foreign tax rate differential									885	(769)	0
Research and development credits									(1,484)	(1,253)	(725)
Change in valuation allowance									(287)	(1,555)	(1,480)
Compensation/option differences									(246)	(471)	(331)
Non-deductible compensation									1,079	944	746
Acquisition costs									54	230	0
Expiring CA NOLs									0	1,626	1,484
Foreign loss not benefited									780	2,342	1,192
Other									637	79	35
Total income tax (benefit) provision	$ (178)	$ 30	$ (15)	$ 37	$ (1,498)	$ (557)	$ 423	$ 785	$ (126)	$ (847)	$ 2,789