Segment Reporting (Details) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2015 USD ($) segment	Dec. 31, 2014 USD ($)	Mar. 31, 2015 USD ($) segment
Segment Reporting Information [Line Items]
Reportable segments | segment			3		4
Net sales	$ 109,256	$ 115,331	$ 278,933	$ 303,770
Gross profit	55,365	52,717	137,902	135,380
Total assets	757,045		757,045		$ 664,885
Intersegment Sales [Member]
Segment Reporting Information [Line Items]
Net sales	4,010	3,980	10,060	12,813
Total assets	(8,430)		(8,430)		(13,007)
Nutritional Food [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Net sales	96,258	106,608	248,249	281,742
Gross profit	54,860	52,884	136,252	134,209
Total assets	705,815		705,815		626,317
Nutritional Food [Member] | Intersegment Sales [Member]
Segment Reporting Information [Line Items]
Net sales	220	72	278	82
Nutritional Supplement [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Net sales	10,569	5,613	26,684	13,960
Gross profit	923	304	2,011	1,544
Total assets	48,459		48,459		38,878
Nutritional Supplement [Member] | Intersegment Sales [Member]
Segment Reporting Information [Line Items]
Net sales	3,436	3,908	9,291	12,731
Other Business [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Net sales	2,429	3,110	4,000	8,068
Gross profit	(418)	(471)	(361)	(373)
Total assets	3,916		3,916		2,169
Other Business [Member] | Intersegment Sales [Member]
Segment Reporting Information [Line Items]
Net sales	354	$ 0	491	$ 0
Unallocated Assets [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total assets	$ 7,285		$ 7,285		$ 10,528