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Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies (Details)

v3.8.0.1
Commitments and Contingencies (Details)
Dec. 31, 2016
USD ($)
Letter of Credit [Member] | USU [Member]  
Line of Credit Facility [Line Items]  
Line of credit, maximum borrowing capacity $ 71,634