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STOCK PURCHASE WARRANTS (Details) - $ / shares shares in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Shares |  |
Beginning balance (in shares) | 1,803 | 1,925
Granted/issued (in shares) | 0 | 892
Exercised (in shares) | (822) | (984)
Ending balance (in shares) | 906 | 1,803
Weighted Average Exercise Price |  |
Weighted average exercise price, beginning balance (in dollars per share) | $ 3.92 | $ 2.71
Weighted average exercise price, Granted/issued (in dollars per share) | 0.00 | 4.75
Weighted average exercise price, Exercised (in dollars per share) | 3.20 | 2.59
Weighted average exercise price, ending balance (in dollars per share) | $ 4.38 | $ 3.92
Warrants |  |
Shares |  |
Beginning balance (in shares) | 1,300 | 3,714
Granted/issued (in shares) | 0 | 305
Exercised (in shares) | (969) | (2,469)
Forfeited (in shares) | 0 | (250)
Ending balance (in shares) | 331 | 1,300
Weighted Average Exercise Price |  |
Weighted average exercise price, beginning balance (in dollars per share) | $ 8.03 | $ 3.25
Weighted average exercise price, Granted/issued (in dollars per share) | 0.00 | 24.66
Weighted average exercise price, Exercised (in dollars per share) | 2.84 | 3.05
Weighted average exercise price, Forfeited (in dollars per share) | 0.00 | 5.75
Weighted average exercise price, ending balance (in dollars per share) | $ 22.14 | $ 8.03

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- Definition The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(3) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Gross number of share options (or share units) granted during the period. + References No definition available. + Details
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- Definition Number of options outstanding, including both vested and non-vested options. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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