Deferred Revenue (Details) - USD ($)	1 Months Ended			3 Months Ended		12 Months Ended
	Sep. 30, 2020	Jan. 31, 2020	Oct. 31, 2014	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2016	Dec. 31, 2020
Deferred Revenue Arrangement [Line Items]
Deferred revenue				$ 9,646,000			$ 10,190,000
Baxter Healthcare Organization
Deferred Revenue Arrangement [Line Items]
Upfront payment			$ 20,000,000
Recognized deferred revenue				500,000	$ 500,000
Deferred revenue				$ 6,700,000			7,200,000
Refund percentage				25.00%
Wanbang Biopharmaceutical
Deferred Revenue Arrangement [Line Items]
Upfront payment						$ 4,000,000.0
Recognized deferred revenue				$ 100,000	100,000
Deferred revenue				2,700,000			2,700,000
Sun Pharma Agreements
Deferred Revenue Arrangement [Line Items]
Upfront payment		$ 100,000
Recognized deferred revenue				2,500	2,500
Deferred revenue				87,500			90,000
Jeil Pharma Agreements
Deferred Revenue Arrangement [Line Items]
Upfront payment	$ 200,000
Recognized deferred revenue				2,500	$ 0
Deferred revenue				$ 200,000			$ 200,000