v3.20.2

Note 2 - Investments and Fair Value Measurement (Tables)

9 Months Ended

Sep. 30, 2020

Notes Tables

Cash, Cash Equivalents and Investments [Table Text Block]

		As of September 30, 2020
		Amortized Cost				Gross Unrealized Gains				Gross Unrealized Losses				Fair Value
Cash and cash equivalents:
Cash		$	1,357			$	—			$	—			$	1,357
Money market funds			1,415				—				—				1,415
U.S. government agency securities			5,002				—				—				5,002
Commercial paper			12,199				—				—				12,199
Total cash and cash equivalents			19,973				—				—				19,973
Short-term investments:
U.S. government agency securities			13,853				—				—				13,853
Commercial paper			9,197				—				—				9,197
Total short-term investments			23,050				—				—				23,050
Total cash, cash equivalents and short-term investments		$	43,023			$	—			$	—			$	43,023

		As of December 31, 2019
		Amortized Cost				Gross Unrealized Gains				Gross Unrealized Losses				Fair Value
Cash and cash equivalents:
Cash		$	1,957			$	—			$	—			$	1,957
Money market funds			598				—				—				598
Commercial paper			12,129				—				—				12,129
Total cash and cash equivalents			14,684				—				—				14,684
Short-term investments:
U.S. government agency securities			14,268				—				—				14,268
Commercial paper			27,131				—				—				27,131
Corporate debt securities			10,054				—				—				10,054
Total short-term investments			51,453				—				—				51,453
Total cash, cash equivalents and short-term investments		$	66,137			$	—			$	—			$	66,137

Fair Value Measurements, Recurring and Nonrecurring [Table Text Block]

		As of September 30, 2020
		Fair Value				Level I				Level II				Level III
Assets
Money market funds		$	1,415			$	1,415			$	—			$	—
U.S. government agency securities			18,855				—				18,855				—
Commercial paper			21,396				—				21,396				—
Total assets measured at fair value		$	41,666			$	1,415			$	40,251			$	—
Liabilities
Contingent put option liability		$	506			$	—			$	—			$	506
Total liabilities measured at fair value		$	506			$	—			$	—			$	506

		As of December 31, 2019
		Fair Value				Level I				Level II				Level III
Assets
Money market funds		$	598			$	598			$	—			$	—
U.S. government agency securities			14,268				—				14,268				—
Commercial paper			39,260				—				39,260				—
Corporate debt securities			10,054				—				10,054				—
Total assets measured at fair value		$	64,180			$	598			$	63,582			$	—
Liabilities
Contingent put option liability		$	437			$	—			$	—			$	437
Total liabilities measured at fair value		$	437			$	—			$	—			$	437

Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]

		Three Months Ended September 30, 2020				Nine Months Ended September 30, 2020
Fair value—beginning of period		$	591			$	437
Fair value of contingent put option associated with the Loan Agreement			(85	)			69
Fair value—end of period		$	506			$	506

		Three Months Ended September 30, 2019				Nine Months Ended September 30, 2019
Fair value—beginning of period		$	657			$	121
Fair value of contingent put option associated with the Loan Agreement			(143	)			514
Change in fair value of contingent put option associated with the Prior Agreement			—				(121	)
Fair value—end of period		$	514			$	514

X

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Tabular disclosure of financial instruments measured at fair value, including those classified in shareholders' equity measured on a recurring or nonrecurring basis. Disclosures include, but are not limited to, fair value measurements recorded and the reasons for the measurements, level within the fair value hierarchy in which the fair value measurements are categorized and transfers between levels 1 and 2. Nonrecurring fair value measurements are those that are required or permitted in the statement of financial position in particular circumstances.

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