SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)

3 Months Ended

Mar. 31, 2020

Accounting Policies [Abstract]

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis

The following tables present information about the Company’s financial assets and liabilities that have been measured at fair value and indicate the fair value of the hierarchy of the valuation inputs utilized to determine such fair value. In general, fair values determined by Level 1 inputs utilize quoted prices (unadjusted) in active markets for identical assets or liabilities. Fair value determined by Level 2 inputs utilize observable inputs other than Level 1 prices, such as quoted prices, for similar assets or liabilities, quoted market prices in markets that are not active, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the related assets or liabilities. Fair values determined by Level 3 inputs are unobservable data points for the asset or liability, and include situations where there is little, if any, market activity for the asset or liability.

	March 31, 2020				December 31, 2019
	Level 1		Level 3		Level 1		Level 3
	(in thousands)
Assets:
Money market funds (included in cash and cash equivalents)	$	36,896	$	—	$	25,263	$	—
U.S. treasury securities (included in short-term investments)	—		—		1,999		—
Total assets	$	36,896	$	—	$	27,262	$	—
Liabilities:
Common Stock warrants (included in accrued and other liabilities)	$	—	$	100	$	—	$	100

Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation

The following tables present information about the Company’s financial assets and liabilities that have been measured at fair value and indicate the fair value of the hierarchy of the valuation inputs utilized to determine such fair value. In general, fair values determined by Level 1 inputs utilize quoted prices (unadjusted) in active markets for identical assets or liabilities. Fair value determined by Level 2 inputs utilize observable inputs other than Level 1 prices, such as quoted prices, for similar assets or liabilities, quoted market prices in markets that are not active, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the related assets or liabilities. Fair values determined by Level 3 inputs are unobservable data points for the asset or liability, and include situations where there is little, if any, market activity for the asset or liability.

	March 31, 2020				December 31, 2019
	Level 1		Level 3		Level 1		Level 3
	(in thousands)
Assets:
Money market funds (included in cash and cash equivalents)	$	36,896	$	—	$	25,263	$	—
U.S. treasury securities (included in short-term investments)	—		—		1,999		—
Total assets	$	36,896	$	—	$	27,262	$	—
Liabilities:
Common Stock warrants (included in accrued and other liabilities)	$	—	$	100	$	—	$	100