Quarterly Financial Data (Unaudited) (Tables)

12 Months Ended

Mar. 31, 2015

Quarterly Financial Information Disclosure [Abstract]

Schedule of quarterly financial data (unaudited)

Quarter Ended:	June 30, 2014		September 30, 2014		December 31, 2014		March 31, 2015
Sales	$	72,541	$	57,576	$	49,284	$	49,994
Gross Profit	$	23,772	$	18,459	$	17,100	$	16,939
Income from operations	$	7,838	$	4,290	$	7,666	$	7,819
Net income	$	4,973	$	2,732	$	4,797	$	4,951
Diluted net income per common share	$	0.25	$	0.14	$	0.24	$	0.25
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