Related Party Transactions - 2019 Bridge Notes (Details)	3 Months Ended
	Jun. 26, 2019 USD ($) item shares	Dec. 31, 2016 USD ($)
Related Party Transaction [Line Items]
Principal amount		$ 12,500,000
2019 Bridge Notes
Related Party Transaction [Line Items]
Number of members of Board of Directors | item	3
2019 Bridge Notes | Jonathan Siegel DBA JBS Healthcare Ventures
Related Party Transaction [Line Items]
Principal amount	$ 75,000
Number of warrants are converted for each share | shares	34,375
2019 Bridge Notes | Sagard Capital Partners
Related Party Transaction [Line Items]
Principal amount	$ 500,000
Number of warrants are converted for each share | shares	187,500
2019 Bridge Notes | Lisa Conte
Related Party Transaction [Line Items]
Principal amount	$ 100,000
Number of warrants are converted for each share | shares	37,500
2019 Bridge Notes | James Bochnowski
Related Party Transaction [Line Items]
Principal amount	$ 350,000
Number of warrants are converted for each share | shares	218,750
2019 Bridge Notes | Jonathan Glaser
Related Party Transaction [Line Items]
Principal amount	$ 500,000
Number of warrants are converted for each share | shares	250,000