Stockholders' Equity (Tables) |
3 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Mar. 31, 2018 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Share-based Compensation, Stock Options, Activity [Table Text Block] |
The following table summarizes stock option activities for the three months ended March 31, 2018:
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Share-based Compensation, Activity [Table Text Block] |
The following table summarizes stock-based compensation expense for the three months ended March 31, 2018 (in thousands).
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Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block] |
A summary of warrant activities for three months ended March 31, 2018 is presented below:
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Restricted Stock [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Schedule of Nonvested Restricted Stock Units Activity [Table Text Block] |
The following table summarizes restricted stock award activities for the three months ended March 31, 2018:
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Restricted Stock Units (RSUs) [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Schedule of Nonvested Restricted Stock Units Activity [Table Text Block] |
The following table summarizes restricted stock units activities for the three months ended March 31, 2018:
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