SUPPLEMENTAL CASH FLOW INFORMATION (Tables)

3 Months Ended

Mar. 31, 2021

Additional Cash Flow Elements and Supplemental Cash Flow Information [Abstract]

Schedule of Cash Flow, Supplemental Disclosures

Supplemental cash flow information and non-cash investing and financing activities were as follows:

	For the three months ended March 31,
(in thousands)	2021		2020
Supplemental cash flow information:
Cash paid for interest	$	39	$	37
Cash refund related to income taxes	$	6	$	—
Supplemental non-cash investing and financing activities:
Property, plant and equipment acquired with seller-financed equipment notes	$	9,407	$	889
Property, plant and equipment purchased but not yet paid	$	7,985	$	360
Finance right-of-use assets obtained in exchange for finance lease liabilities	$	36	$	—
Revenue recognized in exchange for debt principal reduction (1)	$	11,276	$	—

(1)Of the amount for the three months ended March 31, 2021, $9.2 million pertained to product sales to Shenghe, as discussed in Note 8, “Debt Obligations,” and $2.0 million pertained to the tariff rebate, as discussed in Note 4, “Revenue Recognition.