Consolidated Statements of Income (Unaudited) - USD ($)	3 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Consolidated Statements of Income (Unaudited) [Abstract]
Net sales	$ 85,835,000	$ 62,975,000
Cost of goods sold	59,844,000	45,159,000
Gross profit	25,991,000	17,816,000
Operating expenses:
General and administrative	11,360,000	5,392,000
Sales and marketing	2,280,000	1,826,000
Research and development	736,000	522,000
Total operating expenses	14,376,000	7,740,000
Operating income	11,615,000	10,076,000
Interest expense, net	8,437,000	3,413,000
Income before income tax expense	3,178,000	6,663,000
Income tax expense	1,268,000	2,714,000
Net income	$ 1,910,000	$ 3,949,000
Basic net income per share (in dollars per share)	$ 0.11	$ 0.26
Diluted net income per share (in dollars per share)	$ 0.10	$ 0.25
Weighted average number of shares outstanding:
Basic (in shares)	18,002,877	15,082,818
Diluted (in shares)	18,888,013	15,921,367