Commitments and Contingencies - Operating Lease - General Information (Details)	1 Months Ended
	Aug. 31, 2016 USD ($) ft²	Jul. 31, 2016 ft²	Mar. 31, 2016 ft²	Jul. 31, 2015 ft²
Office and warehouse space in Libertyville, Illinois
Operating Leases
Approximate size of office space (in square feet)			48,529
Office space in Bannockburn, Illinois
Operating Leases
Approximate size of office space (in square feet)	15,688	4,795		4,795
Cost of operating leases amendment | $	$ 0