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SHARE-BASED PAYMENTS - Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended
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Mar. 31, 2019 | Mar. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures | 354,844 | 442,956
Allocated Share-based Compensation Expense | $ 1,120 | $ 1,200
R S U Weighted |  |
Number of shares |  |
Number of nonvested shares, beginning of period (in shares) | 1,580,187 |
Granted, nonvested, number of shares (in shares) | 721,750 |
Vested, number of shares (in shares) | (839,348) |
Nonvested options forfeited, number of shares (in shares) | (105,706) |
Number of nonvested shares, end of period (in shares) | 1,356,882 |
Weighted Average Grant- Date Fair Value |  |
Nonvested, weighted average grant date fair value, beginning of period (in dollars per share) | $ 1.99 |
Granted, nonvested, weighted average grant date fair value (in dollars per share) | 2.92 |
Vested, weighted average grant date fair value (in dollars per share) | 1.99 |
Nonvested options forfeited, weighted average grant date fair value (in dollars per share) | 2.24 |
Nonvested, weighted average grant date fair value, end of period (in dollars per share) | $ 2.47 |
Restricted Stock Units (RSUs) |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures | 720,000 | 1,130,000

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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5047-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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