Stock Benefit Plans and Equity Transactions - Summary of Outstanding Warrants (Details)	Mar. 31, 2020 $ / shares shares
Class Of Warrant Or Right [Line Items]
Number of Warrants	24,324,839
2017 Common Stock Warrants
Class Of Warrant Or Right [Line Items]
Number of Warrants	3,107,000
Strike Price | $ / shares	$ 2.00
2017 Banker Warrants
Class Of Warrant Or Right [Line Items]
Number of Warrants	148,554
Strike Price | $ / shares	$ 2.50
2018 Common Stock Warrants
Class Of Warrant Or Right [Line Items]
Number of Warrants	11,663,147
Strike Price | $ / shares	$ 3.50
Merger Warrants
Class Of Warrant Or Right [Line Items]
Number of Warrants	2,199,682
Strike Price | $ / shares	$ 3.50
Executive Warrants
Class Of Warrant Or Right [Line Items]
Number of Warrants	1,327,434
Strike Price | $ / shares	$ 5.00
Squadron Capital Warrant Exercise Price at $3.15
Class Of Warrant Or Right [Line Items]
Number of Warrants	845,000
Strike Price | $ / shares	$ 3.15
Squadron Capital Warrant Exercise Price at $2.17
Class Of Warrant Or Right [Line Items]
Number of Warrants	4,838,710
Strike Price | $ / shares	$ 2.17
Other Warrants
Class Of Warrant Or Right [Line Items]
Number of Warrants	195,312
Strike Price | $ / shares	$ 3.85