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SUPPLEMENTAL CASH FLOW INFORMATION | 12 Months Ended
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Dec. 31, 2021
SUPPLEMENTAL CASH FLOW INFORMATION | 22. SUPPLEMENTAL CASH FLOW INFORMATION Supplemental cash flow information was as follows:
Years Ended December 31, |  | 2021 |  |  | 2020 |  |  | 2019 |
Interest paid |  | $ | 913 |  |  | $ | 1,844 |  |  | $ | 4,341 |
Income taxes net of refunds |  | $ | 124,984 |  |  | $ | 70,889 |  |  | $ | 70,095 |
Common stock issued for MIS |  | $ | 997 |  |  |  | — |  |  |  | — |
Common stock issued for ACME |  | $ | 2,551 |  |  |  | — |  |  |  | — |
Common stock issued for N&S |  |  | — |  |  | $ | (161 | ) |  | $ | 4,032 |
Common stock issued for PPI |  |  | — |  |  |  | — |  |  | $ | 58,344 |
Common stock issued for DASCO |  |  | — |  |  |  | — |  |  | $ | 6,891 |

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- Definition The entire disclosure for supplemental cash flow activities, including cash, noncash, and part noncash transactions, for the period. Noncash is defined as information about all investing and financing activities of an enterprise during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -URI http://asc.fasb.org/topic&trid=2134446 + Details
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