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Stockholders' Equity (Tables)
 9 Months Ended
Sep. 30, 2020
Stockholders' Equity Note [Abstract]  
Key Assumptions Used in Determining Fair Value of Options Granted
The key assumptions used in determining the fair value of options granted during the nine months ended September 30, 2020 follows:
Expected price volatility
59.00%-61.76%
Risk-free interest rate
0.25%-1.68%
Weighted average expected life in years6 years
Dividend yield— 
Summary of Stock Option Activity
Option activity during the nine months ended September 30, 2020 was as follows:
Number of
shares		Weighted average
exercise price per
share		Aggregate
intrinsic
value
Outstanding at January 1, 20205,496,971 $3.64 $15,455 
Granted in 2020:
Officers and Directors1,430,801 $5.64 
Employees1,209,177 $5.65 
Exercised(1,159,347)$2.38 
Forfeitures(365,188)$4.37 
Outstanding at September 30, 20206,612,414 $4.62 $1,620 
Summary of Restricted Stock Activity
Restricted stock activity during the nine months ended September 30, 2020 was as follows:
Number of
restricted
shares		Weighted
average fair
market value
per RSU
Outstanding at January 1, 20201,648,559 $3.86 
Granted in 2020:
Officers and Directors289,949 $5.17 
Employees12,455 $5.50 
Vested(712,654)$2.72 
Forfeitures(407,217)$4.31 
Outstanding at September 30, 2020831,092 $3.82 
Schedule of Earnings Per Share, Basic and Diluted
Three months ended September 30,Nine months ended September 30,
2020201920202019
Basic:
Net income (loss) attributable to common stockholders, basic$9,383 $354 $15,515 $(14,609)
Weighted average common shares outstanding101,031,317 89,649,922 99,377,748 81,612,112 
Basic earnings (loss) per common share$0.09 $— $0.16 $(0.18)
Diluted:
Effect of dilutive securities:
Net income (loss) attributable to common stockholders, diluted$9,383 $354 $15,515 $(14,609)
Weighted average common shares outstanding101,031,317 89,649,922 99,377,748 81,612,112 
Effect of dilutive options and warrants4,752,251 15,488,972 5,458,745 — 
Dilutive weighted average common shares outstanding105,783,568 105,138,894 104,836,493 81,612,112 
Diluted earnings (loss) per common share$0.09$—$0.15$(0.18)