Lease Agreement (Details) (UNIMIN Corporation [Member], USD $)	1 Months Ended
	Jul. 31, 2013 item
UNIMIN Corporation [Member]
Operating Leased Assets [Line Items]
Operating lease agreement, monthly lease payment	$ 10,000
Operating lease agreement, annual increase percent after two years	3.00%
Number of optional additional periods	4
Number of years in each period	5 years