Summary of Significant Accounting Principles (Details-1) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021	Dec. 31, 2020
Cash Cash Equivalents And Restricted Cash [Line Items]
Cash and cash equivalents	$ 26,374	$ 17,438
Restricted cash	641	847
Receivable - margin account	534	550
Cash, cash equivalents, and restricted cash	27,549	18,835	$ 41,502	$ 47,039
MGE [Member]
Cash Cash Equivalents And Restricted Cash [Line Items]
Cash and cash equivalents	17,159	6,401
Restricted cash	641	847
Receivable - margin account	534	550
Cash, cash equivalents, and restricted cash	$ 18,334	$ 7,798	$ 7,972	$ 6,404