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SUMMARY OF CRITICAL ACCOUNTING POLICIES AND ESTIMATES	3 Months Ended
SUMMARY OF CRITICAL ACCOUNTING POLICIES AND ESTIMATES	Mar. 31, 2023
Accounting Policies [Abstract]
SUMMARY OF CRITICAL ACCOUNTING POLICIES AND ESTIMATES	SUMMARY OF CRITICAL ACCOUNTING POLICIES AND ESTIMATES With the exception of the accounting policies below, there have been no new or material changes to the significant accounting policies discussed in the Company’s Annual Report on Form 10-K for the year ended December 31, 2022. Cash, Cash Equivalents and Restricted Cash The Company considers all highly liquid investments with an original maturity of three months or less to be cash equivalents. Restricted cash as of March 31, 2023, consisted of a $6.8 million deposit in a bank for financing of a short-term equipment lease, a $1.5 million deposit in a bank for possible liabilities related to the Heartland Assets and Operations sale, and a $0.1 million deposit in a money market account to serve as collateral for payment of a credit card. Restricted cash as of December 31, 2022, consisted of a $4.8 million deposit in a bank for financing of a short-term equipment lease, and a $0.1 million deposit in a money market account to serve as collateral for payment of a credit card. New Accounting Pronouncements The Company has not identified any recent accounting pronouncements that are expected to have a material impact on our financial condition, results of operations or cash flows upon adoption.