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STOCKHOLDERS' EQUITY - Additional Information (Details) - USD ($) |  | 6 Months Ended
--- | --- | ---
Feb. 28, 2020 | Jun. 30, 2020 | Jun. 30, 2019
Common Stock Capital Shares Reserved For Future Issuance [Line Items] |  |  |
Proceeds from exercise of warrants |  | $ 550,000 | $ 5,379
Proceeds from Issuance of Warrants |  | $ 600,000 |
Aspire Capital |  |  |
Common Stock Capital Shares Reserved For Future Issuance [Line Items] |  |  |
Aggregate shares of common stock | 30,000,000.0 |  |
Agreement Term | 30 months |  |
Common shares issued | 345,357 |  |
Maximum purchase commitment per day | 100,000 |  |
Maximum purchase commitment over term of agreement | 9,200,000 |  |
Board Compensation |  |  |
Common Stock Capital Shares Reserved For Future Issuance [Line Items] |  |  |
Issuance of shares of common stock |  | 85,110 |
Fair value of common stock |  | $ 200,000 |
Exercise of Stock Warrants |  |  |
Common Stock Capital Shares Reserved For Future Issuance [Line Items] |  |  |
Issuance of shares of common stock |  | 458,334 |

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