Quarterly Financial Data (Unaudited) (Tables)

12 Months Ended

Mar. 31, 2014

Quarterly Financial Information Disclosure [Abstract]

Schedule of quarterly financial data (unaudited)

Quarter Ended:	June 30, 2013		September 30, 2013		December 31, 2013		March 31, 2014
Sales	$	74,194	$	60,479	$	50,086	$	48,632
Gross Profit	$	24,013	$	19,252	$	16,889	$	17,463
Income from operations	$	7,497	$	6,532	$	7,047	$	7,142
Net income	$	4,755	$	4,150	$	4,541	$	4,526
Diluted net income per common share	$	0.24	$	0.21	$	0.23	$	0.23
Quarter Ended:	June 30, 2012		September 30, 2012		December 31, 2012		March 31, 2013
Sales	$	68,955	$	58,145	$	49,609	$	51,120
Gross Profit	$	22,304	$	19,370	$	17,212	$	18,235
Income from operations	$	6,204	$	6,326	$	7,209	$	7,266
Net income	$	3,952	$	4,034	$	4,577	$	4,602
Diluted net income per common share	$	0.20	$	0.20	$	0.23	$	0.23