Stock Option Plans and 401(k) Plan (Details 2) - $ / shares	12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Options outstanding at beginning	207,638	212,486
Options granted	145,000
Options exercised
Options forfeited	(10,359)	(2,001)
Options expired	(5,292)	(2,847)
Options outstanding at end	336,987	207,638
Options exercisable at end	201,779	199,013
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Options outstanding at beginning	$ 10.09	$ 10.09
Options granted	$ 8.78
Options exercised
Options forfeited	$ 9.26	$ 9.25
Options expired	9.42	10.56
Options outstanding at end	9.56	10.09
Options exercisable at end	10.11	$ 10.09
Weighted average grant-date fair value of options granted	$ 7.09