Summary of Significant Accounting Policies - Revenues by Major Products (Details) $ in Thousands	12 Months Ended
	Jun. 30, 2018 USD ($) product_line	Jun. 30, 2017 USD ($)	Jun. 30, 2016 USD ($)
Revenue from External Customer [Line Items]
Number of product lines | product_line	2
Revenues	$ 203,204	$ 199,489	$ 206,540
Revenues percentage	100.00%	100.00%	100.00%
Product Concentration Risk | Sale Revenues, Gross
Revenue from External Customer [Line Items]
Concentration risk, percentage	76.60%	77.90%	77.90%
Protandim® product line
Revenue from External Customer [Line Items]
Revenues	$ 133,923	$ 130,873	$ 128,019
Revenues percentage	65.90%	65.60%	62.00%
TrueScience® product line
Revenue from External Customer [Line Items]
Revenues	$ 21,665	$ 24,440	$ 32,914
Revenues percentage	10.70%	12.30%	15.90%
Other
Revenue from External Customer [Line Items]
Revenues	$ 47,616	$ 44,176	$ 45,607
Revenues percentage	23.40%	22.10%	22.10%