Convertible Preferred Stock - Series A Redeemable Convertible Preferred Stock (Details) - USD ($)	1 Months Ended		3 Months Ended		6 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2020	Mar. 31, 2018	Mar. 31, 2021	Dec. 31, 2019
Carrying Value			$ 11,767,000			$ 11,607,000
Accretion to redemption value of redeemable preferred stock			(480,000)
Forecast | Maximum
Product revenue					$ 22,000,000
Average VWAP of common stock for the 30 days prior to Measurement Date					$ 105.00
Series A convertible participating preferred stock
Redemption value			12,739,000			12,739,000
Carrying Value			$ 10,375,000			$ 9,895,000
Redemption price per share			$ 2.3057
Sagard Capital Partners, L.P. | Series A convertible participating preferred stock
Number of shares issued for each convertible preferred stock		473,565		473,565
Maximum period from date of issuance		1 year
Effective conversion price	$ 19.425	$ 19.425
Second Amendment to Note Purchase Agreement and Notes | Sagard Capital Partners, L.P. | Series A convertible participating preferred stock | Private placement
Shares issued (in shares)		5,524,926
Preferred stock, par value (in dollars per share)		$ 0.0001		$ 0.0001
Amount of shares issued				$ 9,000,000
Gross proceeds from the issuance of common stock				$ 9,199,000