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Short-term Investments (Tables)

6 Months Ended

Jun. 30, 2021

Short Term Investments [Abstract]

Summary of Short-term Investments

The following is a summary of our short-term investments (in thousands):

		June 30, 2021
						Gross				Gross
		Amortized				Unrealized				Unrealized				Estimated
		Cost				Gains				Losses				Fair Value
U.S. treasury bills and government agency obligations		$	10,022			$	34			$	—			$	10,056
U.S. corporate debt securities			19,010				7				—				19,017
Foreign corporate debt securities			4,447				—				—				4,447
U.S. commercial paper			4,997				—				—				4,997
Foreign commercial paper			27,988				—				—				27,988
Total		$	66,464			$	41			$	—			$	66,505

		December 31, 2020
						Gross				Gross
		Amortized				Unrealized				Unrealized				Estimated
		Cost				Gains				Losses				Fair Value
U.S. treasury bills and government agency obligations		$	20,110			$	166			$	—			$	20,276
U.S. corporate debt securities			11,505				42				—				11,547
Foreign corporate debt securities			15,508				49				—				15,557
U.S. commercial paper			13,997				—				—				13,997
Foreign commercial paper			41,976				—				—				41,976
Total		$	103,096			$	257			$	—			$	103,353