Annual report pursuant to Section 13 and 15(d)

Notes Payable (Details)

v3.10.0.1
Notes Payable (Details)
$ in Thousands
12 Months Ended
Oct. 15, 2013
USD ($)
Dec. 31, 2018
USD ($)
Jan. 31, 2015
item
Dec. 31, 2013
Notes Payable        
Proceeds from Issuance of Long-term Debt $ 34,000      
Fixed interest rate (as a percent)       5.75%
Number of installments | item     28  
Sweetwater IDR Bond [Member]        
Notes Payable        
Maturity Date   Oct. 01, 2021    
Periodic payment amount   $ 14,996