Long Term Incentive Plan & Stock Options - Options (Details)	12 Months Ended
	Dec. 31, 2017 USD ($) $ / shares shares
OPTIONS OUTSTANDING
NUMBER OF OPTIONS (in shares) | shares	6,906,001
REMAINING CONTRACTUAL LIFE	5 years 1 month 6 days
WEIGHTED EXERCISE PRICE (in dollars per share)	$ 7.92
Intrinsic Value (in dollars) | $	$ 976,335
OPTIONS EXERCISABLE
NUMBER OF OPTIONS (in shares) | shares	6,333,168
WEIGHTED EXERCISE PRICE (in dollars per share)	$ 7.90
Intrinsic Value (in dollars) | $	$ 976,335
$3.09 to $4.93
LONG TERM INCENTIVE PLAN & STOCK OPTIONS
Exercise price, low end of range (in dollars per share)	$ 3.09
Exercise price, high end of range (in dollars per share)	$ 4.93
OPTIONS OUTSTANDING
NUMBER OF OPTIONS (in shares) | shares	389,500
WEIGHTED EXERCISE PRICE (in dollars per share)	$ 3.31
OPTIONS EXERCISABLE
NUMBER OF OPTIONS (in shares) | shares	389,500
WEIGHTED EXERCISE PRICE (in dollars per share)	$ 3.31
$3.09 to $4.93 | Minimum
OPTIONS OUTSTANDING
REMAINING CONTRACTUAL LIFE	1 year
$5.86 to $7.13
LONG TERM INCENTIVE PLAN & STOCK OPTIONS
Exercise price, low end of range (in dollars per share)	$ 5.86
Exercise price, high end of range (in dollars per share)	$ 7.13
OPTIONS OUTSTANDING
NUMBER OF OPTIONS (in shares) | shares	1,922,500
WEIGHTED EXERCISE PRICE (in dollars per share)	$ 6.43
OPTIONS EXERCISABLE
NUMBER OF OPTIONS (in shares) | shares	1,887,500
WEIGHTED EXERCISE PRICE (in dollars per share)	$ 6.43
$5.86 to $7.13 | Minimum
OPTIONS OUTSTANDING
REMAINING CONTRACTUAL LIFE	4 months 24 days
$8.23 to $11.49
LONG TERM INCENTIVE PLAN & STOCK OPTIONS
Exercise price, low end of range (in dollars per share)	$ 8.23
Exercise price, high end of range (in dollars per share)	$ 11.49
OPTIONS OUTSTANDING
NUMBER OF OPTIONS (in shares) | shares	4,594,001
WEIGHTED EXERCISE PRICE (in dollars per share)	$ 8.93
OPTIONS EXERCISABLE
NUMBER OF OPTIONS (in shares) | shares	4,056,168
WEIGHTED EXERCISE PRICE (in dollars per share)	$ 9.02
$8.23 to $11.49 | Minimum
OPTIONS OUTSTANDING
REMAINING CONTRACTUAL LIFE	1 year 9 months 18 days