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Liquidity and Going Concern - Additional Information (Details) $ / shares in Units, $ in Thousands						3 Months Ended				6 Months Ended
	Apr. 27, 2023	Apr. 21, 2023	Apr. 20, 2023	Nov. 22, 2022	May 24, 2022 $ / shares	Jun. 30, 2023 USD ($)	Mar. 31, 2023 USD ($)	Jun. 30, 2022 USD ($)	Mar. 31, 2022 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net loss						$ (1,482)	$ (4,805)	$ (5,282)	$ (4,116)	$ (6,287)	$ (9,398)
Accumulated deficit						$ (473,472)				(473,472)		$ (467,185)
Net cash used in operating activities										$ (8,571)	$ (6,516)
Closing bid price for common stock had fallen below | $ / shares					$ 1.00
Consecutive business days					30 days
Period for regain compliance				180 days
Regain compliance expiry date				May 22, 2023
Stock split conversion ratio	0.06	0.06
Reverse stock split effective date	May 01, 2023
Reverse stock split	one-for-fifteen
Maximum [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stock split conversion ratio			0.06
Reverse stock split			one-for-fifteen
Minimum [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stock split conversion ratio			0.33
Reverse stock split			one-for-three

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