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Description of Business - Additional Information (Details) $ in Thousands		3 Months Ended		6 Months Ended
	Dec. 31, 2020 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Date of incorporation				Mar. 13, 2014
Reverse stock split				1-for-35
Reverse stock split, conversion ratio	0.028571429
Cash	$ 3,331	$ 7,425		$ 7,425
Operating loss		6,166	$ 3,722	9,667	$ 7,724
Accumulated deficit	$ 118,903	128,246		128,246
Revenue from the sale of products or services		$ 71	$ 133	$ 155	$ 339

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