Summary of Significant Accounting Policies (Tables)

12 Months Ended

Mar. 31, 2016

Accounting Policies [Abstract]

Schedule of comprehensive income

			March 31,
	2016		2015			2014
Net income	$	20,567	$	17,453		$	17,972
Net change in unrealized gain (loss) on short term investments		54		(17	)		(35	)
Comprehensive income	$	20,621	$	17,436		$	17,937