STOCKHOLDERS’ DEFICIT - Narrative (Details) - USD ($)						12 Months Ended
	Dec. 26, 2019	Dec. 19, 2019	Apr. 29, 2019	Mar. 18, 2019	Oct. 26, 2018	Dec. 31, 2019	Dec. 31, 2018	Apr. 25, 2019	Mar. 15, 2018
Subsidiary, Sale of Stock [Line Items]
Capital stock authorized (in shares)						360,000,000
Common stock, par value (in dollars per share)						$ 0.0001	$ 0.001
Common stock authorized (in shares)						350,000,000	350,000,000
Preferred stock authorized (in shares)						10,000,000	10,000,000
Preferred stock issued (in shares)						0	0
Common stock outstanding (in shares)						39,477,667	26,088,820
Number of shares issued on transaction (in shares)			4,318,272	4,181,068		8,499,340
Number of securities called by each warrant (in shares)						15,120,898		3,897,010
Number of common stock issued for each purchaser warrant (in shares)		1.2
Exercise of warrants, net of commissions (in shares)	3,593,714.4
Write-off of deferred offering costs						$ 100,056	$ 0
Preferred stock outstanding (in shares)						0	0
Warrant
Subsidiary, Sale of Stock [Line Items]
Number of securities called by warrants or rights (in shares)	2,994,762	5,441,023	4,318,272
At-the-Market Offering
Subsidiary, Sale of Stock [Line Items]
Number of shares issued on transaction (in shares)						705,714	17,576
Sale of stock, ATM maximum equity offering price					$ 40,000,000				$ 40,000,000
Agent commissions fee					3.00%
Consideration received on transaction						$ 1,675,000	$ 43,000