XML 132 R112.htm IDEA: XBRL DOCUMENT v3.7.0.1
Commitments and Contingencies - Leased Space (Details)
Dec. 31, 2016
ft²
Office space in Austin, TX  
Lease obligations  
Leased area of office space (in square feet) 43,000
Office space in Oklahoma City, Oklahoma  
Lease obligations  
Leased area of office space (in square feet) 5,500