Organization and Description of Business - Additional Information (Details) - USD ($)	2 Months Ended	3 Months Ended		6 Months Ended		12 Months Ended
	Mar. 31, 2020	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Organization And Description Of Business [Line Items]
Operating losses		$ (1,821,000)	$ (15,596,000)	$ (15,717,000)	$ (22,728,000)	$ (54,300,000)
Accumulated deficit		(147,776,000)		(147,776,000)		(129,809,000)
Cash on hand		17,189,000		17,189,000		30,353,000
Outstanding borrowings from lenders		31,900,000		31,900,000		35,100,000
Available capacity on borrowings		$ 0		0		$ 0
Equity financing				$ 102,000,000
Percentage of growth in net revenue		97.00%
Sales Revenue | Sale of Products Online in U.S
Organization And Description Of Business [Line Items]
Percentage of revenue		90.00%
Key Manufacturing Partner | China
Organization And Description Of Business [Line Items]
Percentage of manufacturing capacity reached	90.00%
Expected percentage of manufacturing over company's inventory				30.00%