Summary of Significant Accounting Policies - Narrative (Details) $ in Thousands		3 Months Ended
	May 28, 2020	Mar. 31, 2021 USD ($)	Mar. 31, 2020 USD ($)	Dec. 31, 2020 USD ($)	Mar. 31, 2019 USD ($)
Summary of Significant Accounting Policies Details [Line Items]
Reverse stock split, conversion ratio	0.10
Cash in excess of the FDIC insured limit		$ 28,060	$ 11,452
Assets		100,778		$ 87,788
Convertible Note 2019
Summary of Significant Accounting Policies Details [Line Items]
Restricted cash					$ 2,700
Domestic
Summary of Significant Accounting Policies Details [Line Items]
Gross product sales		8,100	5,600
Assets		74,600	146,400
Foreign
Summary of Significant Accounting Policies Details [Line Items]
Gross product sales		3,500	1,800
Assets		$ 26,100	$ 40,500
Sales Revenue
Summary of Significant Accounting Policies Details [Line Items]
Concentration risk		32.70%	16.90%
Accounts Receivable
Summary of Significant Accounting Policies Details [Line Items]
Concentration risk		61.00%	12.00%