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STOCKHOLDERS' EQUITY (Tables)
3 Months Ended
Mar. 31, 2019
Stockholders' Equity Note [Abstract]  
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]
Transactions and other information relating to stock options for the three months ended March 31, 2019, are summarized below:
 
 
 
Number of

Options
 
 
Weighted-Average

Exercise Price
 
 
Weighted-Average

Remaining

Contractual Term (In

Years)
 
 
Aggregate

Intrinsic

Value
 
Outstanding at December 31, 2018
 
 
3,569,000
 
 
$
2.12
 
 
 
7.19
 
 
$
130,000
 
Grants
 
 
 
 
$
 
 
 
 
 
 
 
 
 
Exercised
 
 
15,000
 
 
$
1.90
 
 
 
 
 
 
 
 
 
Forfeited/cancelled/expired/settled
 
 
5,000
 
 
$
1.90
 
 
 
 
 
 
 
 
 
Balance as of March 31, 2019
 
 
3,549,000
 
 
$
2.12
 
 
 
6.94
 
 
$
462,000
 
Vested and expected to vest at March 31, 2019
 
 
3,518,000
 
 
$
2.12
 
 
 
6.92
 
 
$
458,000
 
Unvested at March 31, 2019
 
 
187,000
 
 
$
1.90
 
 
 
8.42
 
 
$
19,000
 
Exercisable at March 31, 2019
 
 
3,362,000
 
 
$
2.13
 
 
 
6.85
 
 
$
443,000
 
Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block]
Transactions and other information relating to restricted stock grants for the three months ended March 31, 2019, are summarized below: 
 
 
 
Shares
 
 
Average
Fair Value
at Grant
Date
 
Unvested at December 31, 2018
 
 
2,124,000
 
 
$
1.85
 
Grants
 
 
780,000
 
 
$
2.13
 
Vested
 
 
(2,453,000
)
 
$
1.91
 
Forfeited/cancelled/expired
 
 
(32,000
)
 
$
2.41
 
Unvested at March 31, 2019
 
 
419,000
 
 
$
2.01