WYOMING ENERGY AUTHORITY GRANT - Roll forward (Details) $ in Thousands	3 Months Ended
Mar. 31, 2024 USD ($)
Grant receivable due from WEA at beginning of year	$ 2,000
Wyoming Energy Authority
Grant receivable due from WEA at beginning of year	2,000
Grant reimbursements received from WEA during the quarter	$ (2,000)

Carrying amount as of the balance sheet date of amounts due under the terms of governmental, corporate, or foundation grants. For classified balance sheets, represents the current amount receivable, that is amounts expected to be collected within one year or the normal operating cycle, if longer.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(3)(a)(4))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

Name:	us-gaap_GrantsReceivableCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant