Cash and Restricted Cash	12 Months Ended
Cash and Restricted Cash	Dec. 31, 2016
Cash And Cash Equivalents [Abstract]
Cash and Restricted Cash	4. Cash and Restricted Cash Cash Cash is maintained at financial institutions and, at times, balances may exceed federally insured limits of $250 thousand at each financial institution. The Company has not experienced any losses related to these balances. Cash at December 31, 2016 and 2015, was $46,563 and $3,896, respectively. Restricted Cash Restricted cash related to the Company represents cash held as collateral relating to an outstanding short-term bond assuring performance under a fuel agreement with a pipeline common carrier. As of December 31, 2016 and 2015, we had $971 and $0 respectively, of restricted cash.

The entire disclosure for cash and cash equivalent footnotes, which may include the types of deposits and money market instruments, applicable carrying amounts, restricted amounts and compensating balance arrangements. Cash and equivalents include: (1) currency on hand (2) demand deposits with banks or financial institutions (3) other kinds of accounts that have the general characteristics of demand deposits (4) short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Generally, only investments maturing within three months from the date of acquisition qualify.