Note 19 - Related Party Transactions (Details) - Related Party Balance Sheet Accounts - USD ($)
$ in Thousands |
Dec. 31, 2015 |
Dec. 31, 2014 |
| Accounts receivable |
|
|
| Accounts receivable, related parties |
$ 10
|
$ 1,173
|
| Prepaid expenses |
|
|
| Prepaid expenses, related parties |
35
|
|
| Accounts payable |
|
|
| Accounts payable, related parties |
244
|
2,912
|
| Accrued liabilities |
|
|
| Accrued liabilities, related parties |
|
46
|
| Affiliated Entity [Member] |
|
|
| Accounts receivable |
|
|
| Accounts receivable, related parties |
10
|
1,173
|
| Prepaid expenses |
|
|
| Prepaid expenses, related parties |
35
|
|
| Accounts payable |
|
|
| Accounts payable, related parties |
244
|
2,912
|
| Accrued liabilities |
|
|
| Accrued liabilities, related parties |
|
46
|
| Affiliated Entity [Member] | Biodiesel [Member] |
|
|
| Accounts receivable |
|
|
| Accounts receivable, related parties |
10
|
1,173
|
| Affiliated Entity [Member] | Natural Gas Purchases [Member] |
|
|
| Accounts payable |
|
|
| Accounts payable, related parties |
233
|
2,912
|
| Affiliated Entity [Member] | Administrative Services and Other [Member] |
|
|
| Prepaid expenses |
|
|
| Prepaid expenses, related parties |
35
|
|
| Affiliated Entity [Member] | Travel and Administrative Services [Member] |
|
|
| Accounts payable |
|
|
| Accounts payable, related parties |
$ 11
|
|
| Accrued liabilities |
|
|
| Accrued liabilities, related parties |
|
$ 46
|