SHARE-BASED COMPENSATION - Stock Option Activity (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Private Innovate 2015 Stock Incentive Plan
Number of Shares
Outstanding, beginning balance (in shares)	6,340,871
Options granted (in shares)	0	0
Options forfeited (in shares)	(177,047)
Options exercised (in shares)	(100,079)
Outstanding, ending balance (in shares)	6,063,745	6,340,871
Options exercisable (in shares)	5,672,827
Options vested and expected to vest (in shares)	6,052,384
Weighted-Average Exercise Price
Outstanding at beginning of period (in dollars per share)	$ 1.53
Options forfeited (in dollars per share)	2.08
Options exercised (in dollars per share)	0.30
Outstanding at end of period (in dollars per share)	1.53	$ 1.53
Exercisable at beginning of period (in dollars per share)	1.49
Vested and expected to vest (in dollars per share)	$ 1.53
Aggregate Intrinsic Value
Outstanding at December 31, 2018	$ (496,275)	$ (4,978,205)
Exercisable at December 31, 2019	496,275
Vested and expected to vest at December 31, 2019	$ 496,275
Weighted-Average Remaining Contractual Life (in years)
Outstanding at December 31, 2018	5 years 4 months 24 days	7 years 8 months 12 days
Exercisable at December 31, 2019	5 years 3 months 18 days
Vested and expected to vest at December 31, 2019	5 years 4 months 24 days
For possible future issuance under the Omnibus Plan
Number of Shares
Outstanding, beginning balance (in shares)	776,131
Options granted (in shares)	2,366,344
Options forfeited (in shares)	(424,605)
Options exercised (in shares)	0
Outstanding, ending balance (in shares)	2,717,870	776,131
Options exercisable (in shares)	1,444,501
Options vested and expected to vest (in shares)	2,619,282
Weighted-Average Exercise Price
Outstanding at beginning of period (in dollars per share)	$ 5.79
Options granted (in dollars per share)	1.33
Options forfeited (in dollars per share)	6.02
Options exercised (in dollars per share)	0.00
Outstanding at end of period (in dollars per share)	1.87	$ 5.79
Exercisable at beginning of period (in dollars per share)	2.05
Vested and expected to vest (in dollars per share)	$ 1.86
Aggregate Intrinsic Value
Outstanding at December 31, 2018	$ 0	$ 0
Exercisable at December 31, 2019	0
Vested and expected to vest at December 31, 2019	$ 0
Weighted-Average Remaining Contractual Life (in years)
Outstanding at December 31, 2018	9 years 4 months 24 days	7 years 4 months 24 days
Exercisable at December 31, 2019	9 years 3 months 18 days
Vested and expected to vest at December 31, 2019	9 years 4 months 24 days