XML 22 R8.htm IDEA: XBRL DOCUMENT
v3.19.1

Prepaid Expenses and Other Current Assets | 3 Months Ended
--- | ---
Mar. 31, 2019
Prepaid Expenses and Other Current Assets |
Prepaid Expenses and Other Current Assets | Note 2 — Prepaid Expenses and Other Current Assets Prepaid expenses and other current assets consisted of the following (in thousands):
|  | March 31, |  | December 31,
|  | 2019 |  | 2018
Rio Grande LNG site option |  | $ | 365 |  | $ | 508
Short-term security deposits |  |  | 27 |  |  | 18
Rio Bravo Pipeline options |  |  | 40 |  |  | 54
Prepaid insurance |  |  | 191 |  |  | 233
Prepaid marketing and sponsorships |  |  | 782 |  |  | 242
Other |  |  | 376 |  |  | 255
Total prepaid expenses and other current assets |  | $ | 1,781 |  | $ | 1,310

X
- Definition The entire disclosure for prepaid expenses and other current assets. + References No definition available. + Details
Name: | next_PrepaidExpenseAndOtherCurrentAssetsTextBlock
Namespace Prefix: | next_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_PrepaidExpenseAndOtherAssetsCurrentAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration